Chile. The show itself was called "time is golden" when translated into English. It's the same sound but i woudn't be able to tell you if it was from this exact keyboard or not. PS: I had a Casio SA when I was a kid, it was my first keyboard
Radio Shack actually put final assembly date codes on most of their devices. On the bottom, it has "6A0" on it, and that is the date, where the first number is the month, 1-12, the "A" is a spacer, and the last number is the final digit of the year. So, your keyboard was assembled in June of 1990.
I just picked one of these up at a Yard Sale for $6 with a “QuikLok” stand. I’ve been keeping my eyes open for one of these keyboards in satisfactory condition for some time, I lucked out & found one that came in it’s original box with everything original present along with a nice stand. The people at this Yard Sale had no idea what they were offering, I was able to walk away with MANY other items I’ve been looking out for in addition to a Japanese Imperial Navy leather cap in oddly good condition, the seller’s claimed original owner is a grandfather who served in a not specified branch of US service who didn’t serve in Japan, however owned many items which apparently originated from Japan of WWII era. Including early Honda items, including a Honda E40 & Honda “Cuby” engines & kits!
Oh the amp chip is being used in bridge mode to give more power to the speaker, it’s a way to use a stereo chip in mono, but with a higher output wattage using both parts of the amp
This keyboard was my second keyboard ever. This vid brings back so many memories. I remember using that demo song for intro to my fake radio show as a kid.
David, the main reason why you record from the input of the amplifier is that the Amp's noise adds when you amplidfy your signal. If you use the method you said before (record directly from the inputs of the amplifier) then you'll get a less noisy signal. If your amp is a low noise amp you can just use the outputs directly but if it is a noisy one (not realy used in audio technics tho) you should get the signal from the inputs instead of the outputs. In most cases try to use the amplifiers inputs for the line output for clear audio. Love the show :)
Ohh the memories, I think I had the same keyboard, bought it as Casio CA-110. Had the same demo tune, most of the sounds are similar, though my default sound was Piano (starting at 00) And you can change the note polyphony from 4-note to 8-note using the Sound button. Sold the keyboard to a guy, but I think I have the manual somewhere!
Wow, man. That demo tune made me cry. I remember my grandfather had an old keyboard in his basement with the same demo tune, and when I was young and visited him, we would often go play with the keyboard. It sort of became our little tradition to listen to the demo tune before either of us would play anything. It's been a few years since he passed away. I miss you, grandpa. edit: Could you potentially capture a high quality sample of the demo loop?
well, the amplifier have the 2 outputs connected to the speaker to use all the power the amplifier have to offer, if not the speaker uses just half of it (considering you are using only one speaker, if you are using 2 and a 5w amplifier each speaker would get one out to the positive closing the circuit to ground using 2.5w totalizing 5w)
Thanks for this video :) A few months ago I asked you for a video about that keyboard because I have it myself and I wanted to see what others think about it :) I have some problems with the volume slider. It's as if loses connection. Very good channel and video :)
Hello! I love all your channels. I have a small suggestion, how about you show a modern keyboard just for us ignorants understand how the technology evolved in 20-30 years. I understand your focus is vintage tech, but I'd love to see a comparison of the 80-90-2000-2010 evolution.
I would love to have a multitrack file with all the different keyboards at the same time so i can listen the difference really simple, that would be awesome
If anyone has seen the strange video Banjo Gyro by Grady Sain, it looks like a lot of the sound effects come from this keyboard. The Cosmic Dance setting definitely sounds like it was used in that video.
It was always hilarious that Radio Shack would sell, for example, a receiver that Pioneer discontinued the year before, slap their brand on it, and then sell it at full price. Meanwhile, you could go to any other electronics store, or even Sears, and get it on clearance.
This keyboard was rebranded after the CA-110, witch has that demosong: Toy Symphony (also used in the SK-1), Ode to joy and then one i've heard but can't remember the name of. Could someone correct me?
Before you might see another disappointment: The PSR 6 is the same like the PSS 270 with full size keyboard. Which is a good thing as this board was fun indeed but nothing surprising just. The higher lines of that era, especially the PSR-36 might be more interesting I think.
That is odd that they put a brass instrument as the first, on all Casio SA ToneBank keyboards I have seen and played, they all had piano as default. I do prefer the reverb of the SA keyboards over this one, plus I think the dums sound better too (I have played the SA-8 which I own and a SA-1 which I want to get again)
what wire/connector did you use to capture the output from the keyboard to pc , and can i just use a usb cable to output the sound from the keyboard to the pc
That "Sampled Percussion" instrument sounds like it could be a poor attempt at an "Orchestra Hit" (which was one of the big sounds of the 90s after all).
As an audio engineer I have to say you should listen to the end of the recording chain. If you listen to the beginning, i.e. the source, you might not hear problems further down the chain, e.g. buzzing or distortion. Just my 2c.
Sadly this can make it really difficult if you're playing the instrument and you use a digital recording device, which can often add a bunch of delay into the sound.
You can hear the Casio sound underneath the hood no matter what brand they slap on top. Why they put Brass as the first one is hard to tell, because on the Hohner PSK range (same as the Casio MT series), they grouped the sounds more traditionally with Piano, E-Piano, Harpsi, Vibraphone etc first. Maybe the Radioshack guys had a say in how they wanted it to be? How is the layout on the real Casio CA-100 in comparison? :)
its exactly the same on the real CA-100. However, I have a Yamaha keyboard from the same time period and same target price/demographic and it also defaults to a brass instrument (trumpet, I believe) and I scratched my head on that one too. I think it boils down to engineers making a toy and not having any real musicians being part of the design team.
I actually have this exact keyboard myself! Radio Shack rebranding and everything. But one correction about the polyphony at 8:31 . You can actually have up to 8-voices on every instrument. The instrument select button also has a label that says "poly/texture". If you press the button, it alternates between limiting the keyboard to 4-voices and giving you a more "textured" sound (which just seems to add a bit more reverb or some sort of modulation) or giving you the full 8-voices without any "texture". Thus the actual complexity of the instrument doesn't really actually matter. It's just dependent on if the instrument is set to "poly" or "texture" mode.
+Neapolitan_ Husky I was about to write an answer myself when I read yours. Also, he didn't try the auto-accompaniment feature which limits you even further: 2 notes in texture "mode" and only one note in "poly" mode! I also have the same keyboard from when I was a kid. The interesting part is that when you remove the Realistic label on back, you find the original "CASIO CA-100" brading directly on the plastic. However, I suspect the sounds be actually PCM (I didn't belive it back in the day) but very short looped samples, like wavetable. Nobody bothered ripping the content of EPROM chips (if it's technically possible) from the Casio CA line so I can't really tell.
You should not use a polarized capacitor when connecting to a BTL amplifier like this one. In addition, the keyboard can never share the same ground as the device you're connecting to or you're likely to have a dead amplifier chip.
(I agree with you.) I asked the same question before. Electrolytic capacitors can withstand 1 to 1.5V reverse voltage. Thus, line level AC should be fine in this case. Moreover, the keyboard itself's already isolated as a transformer's being used at the 9V power input. (But I would use a ground loop isolator whenever dealing with different voltage of ground.)
I don't know about you, but I'd put some heat-shrink on capacitor legs at 7:13 ;) Also, I'm just curious - if both outputs are floating, wouldn't it be better to put capacitors on both wires? Because now your CINCH ground isn't same as DC jack ground.
I had a little keyboard with the exact same synthesizer as this as a kid. It also came with a song bank, with Ode To Joy. I used to call it the "piano song" and when I learned to play it I was so happy lmao
Another trick you can use to get line output is to unsolder the leg of the headphone jack which causes it to mute the speaker when there is something plugged in. This essentially turns your headphone jack into a line output. I have a much newer Casio keyboard where I did this and also added a little switch so I can change whether it's a headphone jack or a line output jack.
He just likes to do (unnecessary) mods and make up reasons for doing them... I think it's more about the process than it is about the result, in spite of what he might say.
I believe most of these connectors that "auto mute" mechanically disconnects the speakers when something is inserted. Drilling a new hole would be sensible in that case, as that would put it on par with most modern keyboards that have both a headphones and a line out connector.
Disclaimer: I'm not actually an electronics engineer, especially not a music-realted one. Your capacitor is WAAAAY TOO LARGE! You need no more than about 1uF..10uF cap. That's 100 to 1000 times less than the one you used. I won't be surprised if the sound you heard mostly came from leakage current - with the capacitor acting as a resistor. Also half of the time your cap is connected in reverse - VERY BAD for electrolytic caps. You probably did not notice yet because it is rated 50V and the audio levels are probably about 1V - that may be within its tolerance but still a bad idea. Electrolytic caps are mostly just for power supply filtering. Use a ceramic cap - they are unpolarized (mylar or polycarbonate should have less distortion, or so I'm told, but ceramic is fine for this project) More importantly, ONE CAP IS NOT ENOUGH when you are tapping into both leads of a balanced circuit - you need a second cap on second lead. This is because if power supply "-" is connected to a protected earthing on the 3-prong AC plugs on both sides, you are essentially shorting one lead to ground exactly where there is absolutely no protection against it. You probably didn't notice because the keyboard connects via an unearthed plug but it's asking for a disaster to happen. There's another problem with your setup - you connected a BALANCED circuit in your keyboard to an UNBALANCED cable+circuit in your computer. This has subtle side-effects like kind-of circumventing the shielding of your audio-cables. Normally you need something called "balun" which consists of a transformer and some optional resistors - you can buy one of these or just wrap 2 parallel strands of fine wire around a ferrite core. If you use a balun you should not need any capacitors, although you should connect a current-limiting resistor in series (I'd guess 10 ohm is fine, probably). However, since the keyboard won't actually produce any studio-quality Hi-Fi sound anyway, and you are not connecting it via a 10+ meter audio-cable, so you can skip the balun altogether and just use 2 caps.
You really should have tapped the line out before the amp, not after, as that's what a line out *is*. Of course the signal after the amp was stronger, that's what amps do! With the way you've done it, it would have been simpler to just plug the output into the line in on your computer and plug your headphones into your computer. No mod was necessary.
My thoughts exactly. The amp was designed to drive into an 8 ohm load not be used as a line out signal. Taking the signal before the amp is the way to go as it's designed to run into a higher impedance load. A line input is specked at 10K ohms.
Bravo. Your comments are spot on. Tapping the signal before the amp give you the best wave reproduction therefore leaving headroom to be further use via en external preamp. He could have skipped the mod. However he did indicate that he just wanted to be able to hear the speakers while plugged into a stereo.
Wow, I had this exact keyboard when I was a kid, hearing that demo track just brought back a flood of memories. It wasn’t much but it certainly gave me many hours of enjoyment. Thanks for showing us this! 👍🖖
I hate to correct you, David, but this appears to be a rebranded Casio CA-110, not a CA-100. The demo tune is a dead giveaway, and is about the only difference between the two...
Just re-watched this vid, and I realised something... You said that the keyboard "doesn't have a headphones output or anything like that", but it actually does. hehe imgur.com/a/FuTyk imgur.com/a/UWUm2 It even connects from the speaker-level output, so it's definitely intended for headphones, but also already has a cap for AC-coupling (DC blocking), plus some 120 Ohm resistors, for limiting the max output slightly. Or, for a cleaner line-level output (ie. bypassing the amp altogether), you could still tap off the signal on the "volume" side of capacitor C36... imgur.com/a/qnj4z
I wonder if Death Grips sampled that 'Cosmic Sound' patch, even indirectly. I vividly remember a sound incredibly similar (likely processed) in "The Fever (Aye Aye)" near 42 seconds into the song.
@ 8-bit Keys I have the Casio CA-301, CA-401, CTK-100, CTK-120, CTK-130, MA-101, MA-120, MA-130, and MA-201. All of those keyboards are based on the same sound chip as the CA-100. I also have the Casio CT-400, CT-840, and MA-220. Those three keyboards have similar sound hardware, but a few of the sounds are different from the other afore mentioned models. For example, the piano sounds more realistic on the MA-220 than on the MA-130. I also have in my vintage portable electronic keyboard collection the Casio CTK-150 and one of its bigger brothers the CTK-300. Both keyboards have a lot of the same sounds as the other models mentioned above, but here some of those sounds improved resembling what they’re supposed to be, such as the trumpet and the harpsichord for example. However, some other sounds such as the accordion and the bagpipes didn’t improve at all.
11:16 The Casio Ca 100 / realistic concertmate 670 has 5 bass species, namely 29 = slap bass, 30 = elec bass, 31 = WOOD bass, 32 = snare bass and 69 = synth bass, in which the lower seven keys as drums act. Nowhere in the operator instructions is this function documented!
I think the inverted signal sent to the speaker is called a balanced output signal. It's made to eliminate electrical noise during the transmission of the signal. I guess that's why you get a better signal from the speaker.
it's called a bridge-tied load configuration, and he correctly identified the reason this was done at 5:27. it has nothing to do with common-mode noise rejection in this context. the audio rip using the inverted signal as a ground reference should be 6dB higher in level than the chassis-ground version.
@@technology4617 Okay thanks for the correction, It's configured that way to amplify the signal and not to correct noise if I understand. It would only cancel the signal if it was not inverted.
7:28 I think because the voltage provided to the speaker is around 2V. If the speaker is 8 Ohms, it will run at 2.25W. If the speaker is 4 Ohms, it will run at 2.5W. They basically cut out a poweramplifier, and just installed a cheap speaker on their line signal; since every system actually has a soundchip, a line amplifier (for line out), and a power amplifier or two. It's probably an FM chip. 9:38 I think they just dual layered instruments, causing it to sound like it was an octave higher. Yamaha Clavinova has the same problem with layering samples. 13:43 Even with professional instruments, I end up only liking about 10 good sounds out of 500 bad ones.
The sounds of this keyboard bring back so many memories to me... I had the Casio MA130, which has almost the same sounds, but has a smaller keyboard. I even did some multitrack recordings with my dad's stereo reel to reel by recording off one channel to the other and adding a new instrument every time. (I also used it for some echo as well)
yes but it sounds different coming from PC connected speakers/headphones, compared to the keyboard itself, and some professionals would definetly notice the input lag vs hearing the sound, and it would be disruptive.
Ryuhouji No it doesn’t, that’s what professionals use actually. Every DAW does this and the delay is so small you will never notice it, especially an amateur
I had a keyboard like that once, I think it was the same model as the one here I can't quite remember, but I do remember those same low quality sounds (I even sampled every one of them for some reason), I think it also had the same demo song.
I like to use a dual headphone jack, then I wear two pairs of headphones at the same time so I can hear the recordings I've already made and the recording I'm making currently.
"Laptop or computer"? You have GOT to be kidding us, Dave! No, you didn't just say that nonsense! Ohh, you did! I can't believe it! Laptop (computers) ARE computers! (You need a text card here that says something like, "Oops, I meant 'laptop or DESKTOP computer', or just 'computer'.")
In the CA-110 will get anti-rickrolled when you press the DEMO button om keyboard that plays Together Forever by Rick Astley, but not on the CA-100 Just like Nightbirds by Shakattak from your MT-240 and CT-380.
I recognize a lot of sounds from my SA-21. But since it is younger it has a much better piano and e-piano sound. Strings, brass and bells though seem to be the same. Also the drums are very similar.
Ok, i like sound of this shitty cheap Casio so much that i found Casio CTK 120 here on one czech site with used items. It luckily seems to be the same instrument just in a bit more modern case - same sounds, same buttons just different look and two speakers. BTW - it´s 8 voice polyphony keyboard - doesn´t matter which sound used. Just need to press "Poly/Texture" to change mod.
Hey David, another great video! I was wondering, do you capture your (keyboard) drum lines and then loop them in your software or literally play them all the way through the song? I don't think I could get through an entire song without a mistake if I had to hit those keys for the drum track.
I remember that Realistic branding thing. I am a big fan of Koss headphones and many headphones under the Realistic brand were actually Koss; you could tell because the Koss logo would be there, understated, somewhere on the headphones.
I've got the Casio CA-110. That's the same demo tune as the CA-110. The sounds are all the same but the CA-110 puts them in a different order. The Keyboard sounds are first, then Wind, then the 2 columns of String and then comes the Brass. Everything else is in the same order. This all puts the default sound on Piano. The CA-110 also claims Pulse Code Modulation. I also like the colors and additional graphics on the Casio CA-110 better.
That actually sounded absolutely terrible. I remember Casio slapping Pulse Code Modulation labels on everything back in those days. If it was, it is using a sample rate you'd expect from telephony.
If you use/have access to a PC use a basic USB 2.0 sound card. You can get basic models and ones where you can switch between mic/line in and they are an absolute need for someone who has a laptop with a single multi use 3.5mm jack I/O. You could probably get one on Ebay for a few dollars.
I just found a Casio CA100 for $5.. but it's in terrible condition... so i'm doing my first keyboard restoration "8 bit key's" style!! wish me luck!
Luis Niels how did it go
Did you do it?
@@RickyRat256 Yes I did it... complete restoration, look brand new!!
@@NielsCG rcde
M
@@NielsCG could you post a video to your channel of the restored ca100
Fun fact, a tv gameshow from my country in the mid 90s used the sound at 12:00
Chile. The show itself was called "time is golden" when translated into English. It's the same sound but i woudn't be able to tell you if it was from this exact keyboard or not.
PS: I had a Casio SA when I was a kid, it was my first keyboard
i swear that sound is used in some Death Grips song
Radio Shack actually put final assembly date codes on most of their devices. On the bottom, it has "6A0" on it, and that is the date, where the first number is the month, 1-12, the "A" is a spacer, and the last number is the final digit of the year. So, your keyboard was assembled in June of 1990.
I just picked one of these up at a Yard Sale for $6 with a “QuikLok” stand. I’ve been keeping my eyes open for one of these keyboards in satisfactory condition for some time, I lucked out & found one that came in it’s original box with everything original present along with a nice stand. The people at this Yard Sale had no idea what they were offering, I was able to walk away with MANY other items I’ve been looking out for in addition to a Japanese Imperial Navy leather cap in oddly good condition, the seller’s claimed original owner is a grandfather who served in a not specified branch of US service who didn’t serve in Japan, however owned many items which apparently originated from Japan of WWII era. Including early Honda items, including a Honda E40 & Honda “Cuby” engines & kits!
Oh the amp chip is being used in bridge mode to give more power to the speaker, it’s a way to use a stereo chip in mono, but with a higher output wattage using both parts of the amp
OMG I used to have the Casio version of this! It's so cheesy sounding, I love it and I especially loved the TOGETHER FOREVER demo on it.
And #88 was my favorite sound.
I have had it for 31 years and counting, without ever needing to repair it. I've listened to that demo a thousand times at least
This keyboard was my second keyboard ever. This vid brings back so many memories. I remember using that demo song for intro to my fake radio show as a kid.
Yay for use of the piano meter once again, seemed to be missing from some past ones.
David, the main reason why you record from the input of the amplifier is that the Amp's noise adds when you amplidfy your signal. If you use the method you said before (record directly from the inputs of the amplifier) then you'll get a less noisy signal. If your amp is a low noise amp you can just use the outputs directly but if it is a noisy one (not realy used in audio technics tho) you should get the signal from the inputs instead of the outputs. In most cases try to use the amplifiers inputs for the line output for clear audio. Love the show :)
the square wave you demo'd really reminded me of the sound of Shadowgate on the nes.
Um... why not just say "demoed," since it's the same number of characters and doesn't pointlessly skip anything?
Ohh the memories, I think I had the same keyboard, bought it as Casio CA-110. Had the same demo tune, most of the sounds are similar, though my default sound was Piano (starting at 00)
And you can change the note polyphony from 4-note to 8-note using the Sound button.
Sold the keyboard to a guy, but I think I have the manual somewhere!
Wow, man. That demo tune made me cry. I remember my grandfather had an old keyboard in his basement with the same demo tune, and when I was young and visited him, we would often go play with the keyboard. It sort of became our little tradition to listen to the demo tune before either of us would play anything. It's been a few years since he passed away. I miss you, grandpa.
edit: Could you potentially capture a high quality sample of the demo loop?
well, the amplifier have the 2 outputs connected to the speaker to use all the power the amplifier have to offer, if not the speaker uses just half of it (considering you are using only one speaker, if you are using 2 and a 5w amplifier each speaker would get one out to the positive closing the circuit to ground using 2.5w totalizing 5w)
100k subs, congratulations
some of the music he was playing sounded like final fantasy one or shadow gate kemco games. rocking!
love this series.
Thanks for this video :) A few months ago I asked you for a video about that keyboard
because I have it myself and I wanted to see what others think about it :) I have some problems with the volume slider. It's as if loses connection. Very good channel and video :)
Hello! I love all your channels. I have a small suggestion, how about you show a modern keyboard just for us ignorants understand how the technology evolved in 20-30 years. I understand your focus is vintage tech, but I'd love to see a comparison of the 80-90-2000-2010 evolution.
I would love to have a multitrack file with all the different keyboards at the same time so i can listen the difference really simple, that would be awesome
If anyone has seen the strange video Banjo Gyro by Grady Sain, it looks like a lot of the sound effects come from this keyboard. The Cosmic Dance setting definitely sounds like it was used in that video.
It was always hilarious that Radio Shack would sell, for example, a receiver that Pioneer discontinued the year before, slap their brand on it, and then sell it at full price. Meanwhile, you could go to any other electronics store, or even Sears, and get it on clearance.
This was my very first keyboard!
Liked for the nostalgia
But can it do Multi-Track Drifting?
Like the new music David!
I don't think there was a single friend I had who didn't have this model of piano.
Sample Percussion sounds like smash when you are selecting a difficulty
Waw Voice is the best tone.
i am getting my first ever keyboard and i am chosing between a Yamaha Portasound PSS-170 and a Yamaha PSR-75, which one should i get?
Please make a video of the Yamaha PSR-60.
This keyboard was rebranded after the CA-110, witch has that demosong: Toy Symphony (also used in the SK-1), Ode to joy and then one i've heard but can't remember the name of. Could someone correct me?
Before you might see another disappointment: The PSR 6 is the same like the PSS 270 with full size keyboard. Which is a good thing as this board was fun indeed but nothing surprising just. The higher lines of that era, especially the PSR-36 might be more interesting I think.
That is odd that they put a brass instrument as the first, on all Casio SA ToneBank keyboards I have seen and played, they all had piano as default. I do prefer the reverb of the SA keyboards over this one, plus I think the dums sound better too (I have played the SA-8 which I own and a SA-1 which I want to get again)
GASP! I have a Casio MT series too! OH I'M SO EXCITED!
My ca110 had a sustain button but it reduced the polyphony. it was above the demo button i think.
what wire/connector did you use to capture the output from the keyboard to pc , and can i just use a usb cable to output the sound from the keyboard to the pc
Is it me, or do some of them like 070 and synth strings sound like background music in mortal kombat music?
Do I hear the Seinfeld Bass in the background? 3:28
Okay, I know it's technically the Slap Bass sample from the Korg M1. See, I know my crap.
No it definitely sounds different
That "Sampled Percussion" instrument sounds like it could be a poor attempt at an "Orchestra Hit" (which was one of the big sounds of the 90s after all).
11:41 Sounds more like a Metrowagonmash 81-717 train from the 80s/90s
I rode one today, and yes it does. But the real train has more rumble.
Have you reviewed the Radio Shack MD-500. Great show.
So the Casio keyboard rick rolls you, when you play the demo tune?
it might be a different song.
Could be Together Forever or whatever
Ah crap looks like I was to late to make that joke then
It's actually together forever and not rickroll :(
Casio SA-1 plays Wake Me Up Before You Go-Go
As an audio engineer I have to say you should listen to the end of the recording chain. If you listen to the beginning, i.e. the source, you might not hear problems further down the chain, e.g. buzzing or distortion. Just my 2c.
Sadly this can make it really difficult if you're playing the instrument and you use a digital recording device, which can often add a bunch of delay into the sound.
You can short the internal switch of headphone socket on circuit to keep internal speaker ON even when headphone jack is plugged in.
Shreyas kulkarni or hook it up to a switch, so it can also be only on headphones
Casio, c.1990: "The piano sound is awful. Bury it behind the brass."
Pfahaha I love how at 6:17 he just reversed the soldering clip because he probably forgot to record one :D
That's exactly what I did.. and yes, I forgot to record it.
Didn't even notice :) When content trumps errors.
EpicLPer I noticed how unusually fast the soldering went at that part, but didn't notice it was in reverse lol
gir489, The only way to recapture the genie!
YOU ARE F*CKING TOPCOMMENT AGAIN! STOP YOU BOTTING
You can hear the Casio sound underneath the hood no matter what brand they slap on top. Why they put Brass as the first one is hard to tell, because on the Hohner PSK range (same as the Casio MT series), they grouped the sounds more traditionally with Piano, E-Piano, Harpsi, Vibraphone etc first.
Maybe the Radioshack guys had a say in how they wanted it to be? How is the layout on the real Casio CA-100 in comparison? :)
its exactly the same on the real CA-100. However, I have a Yamaha keyboard from the same time period and same target price/demographic and it also defaults to a brass instrument (trumpet, I believe) and I scratched my head on that one too. I think it boils down to engineers making a toy and not having any real musicians being part of the design team.
8-Bit Keys Hi Hi I love your channel
Layout on real Casio CA-100 is the same... I have it myself :)
Lovro Sabljak Hmm, then it's another reason for it. Guess we have to find one of the engineers who worked on it back then... 😜
:D
I actually have this exact keyboard myself! Radio Shack rebranding and everything. But one correction about the polyphony at 8:31 . You can actually have up to 8-voices on every instrument. The instrument select button also has a label that says "poly/texture". If you press the button, it alternates between limiting the keyboard to 4-voices and giving you a more "textured" sound (which just seems to add a bit more reverb or some sort of modulation) or giving you the full 8-voices without any "texture".
Thus the actual complexity of the instrument doesn't really actually matter. It's just dependent on if the instrument is set to "poly" or "texture" mode.
+Neapolitan_ Husky I was about to write an answer myself when I read yours. Also, he didn't try the auto-accompaniment feature which limits you even further: 2 notes in texture "mode" and only one note in "poly" mode! I also have the same keyboard from when I was a kid. The interesting part is that when you remove the Realistic label on back, you find the original "CASIO CA-100" brading directly on the plastic.
However, I suspect the sounds be actually PCM (I didn't belive it back in the day) but very short looped samples, like wavetable. Nobody bothered ripping the content of EPROM chips (if it's technically possible) from the Casio CA line so I can't really tell.
@@Dioxaz This also labled as a Hohner PSK 20
I wonder if that chip has a sustain input... if so, perhaps you could add a pedal jack.
The demo song at 6:00 is "Touch in the Night" from Silent Circle
I don't think that's it.
But now your line output (that should be a defined voltage) are controlled by your main volume slider...
You should not use a polarized capacitor when connecting to a BTL amplifier like this one. In addition, the keyboard can never share the same ground as the device you're connecting to or you're likely to have a dead amplifier chip.
(I agree with you.) I asked the same question before. Electrolytic capacitors can withstand 1 to 1.5V reverse voltage. Thus, line level AC should be fine in this case. Moreover, the keyboard itself's already isolated as a transformer's being used at the 9V power input. (But I would use a ground loop isolator whenever dealing with different voltage of ground.)
why is it bad to use polarized ac coupling capacitors with btl amps
I don't know about you, but I'd put some heat-shrink on capacitor legs at 7:13 ;)
Also, I'm just curious - if both outputs are floating, wouldn't it be better to put capacitors on both wires? Because now your CINCH ground isn't same as DC jack ground.
I had a little keyboard with the exact same synthesizer as this as a kid. It also came with a song bank, with Ode To Joy. I used to call it the "piano song" and when I learned to play it I was so happy lmao
Another trick you can use to get line output is to unsolder the leg of the headphone jack which causes it to mute the speaker when there is something plugged in. This essentially turns your headphone jack into a line output. I have a much newer Casio keyboard where I did this and also added a little switch so I can change whether it's a headphone jack or a line output jack.
He just likes to do (unnecessary) mods and make up reasons for doing them... I think it's more about the process than it is about the result, in spite of what he might say.
I believe most of these connectors that "auto mute" mechanically disconnects the speakers when something is inserted. Drilling a new hole would be sensible in that case, as that would put it on par with most modern keyboards that have both a headphones and a line out connector.
what is this leg on the jack? i have one but i dont know :S
@@etiennelj if you dont like the channel, dont click on the videos or comment!
@@eemeli7093 why not ? Diverse opinions make for a richer discussion. Criticism prods innovation.
Disclaimer: I'm not actually an electronics engineer, especially not a music-realted one.
Your capacitor is WAAAAY TOO LARGE! You need no more than about 1uF..10uF cap. That's 100 to 1000 times less than the one you used. I won't be surprised if the sound you heard mostly came from leakage current - with the capacitor acting as a resistor.
Also half of the time your cap is connected in reverse - VERY BAD for electrolytic caps. You probably did not notice yet because it is rated 50V and the audio levels are probably about 1V - that may be within its tolerance but still a bad idea. Electrolytic caps are mostly just for power supply filtering. Use a ceramic cap - they are unpolarized (mylar or polycarbonate should have less distortion, or so I'm told, but ceramic is fine for this project)
More importantly, ONE CAP IS NOT ENOUGH when you are tapping into both leads of a balanced circuit - you need a second cap on second lead. This is because if power supply "-" is connected to a protected earthing on the 3-prong AC plugs on both sides, you are essentially shorting one lead to ground exactly where there is absolutely no protection against it. You probably didn't notice because the keyboard connects via an unearthed plug but it's asking for a disaster to happen.
There's another problem with your setup - you connected a BALANCED circuit in your keyboard to an UNBALANCED cable+circuit in your computer. This has subtle side-effects like kind-of circumventing the shielding of your audio-cables. Normally you need something called "balun" which consists of a transformer and some optional resistors - you can buy one of these or just wrap 2 parallel strands of fine wire around a ferrite core. If you use a balun you should not need any capacitors, although you should connect a current-limiting resistor in series (I'd guess 10 ohm is fine, probably).
However, since the keyboard won't actually produce any studio-quality Hi-Fi sound anyway, and you are not connecting it via a 10+ meter audio-cable, so you can skip the balun altogether and just use 2 caps.
Yup, the most critical thing here is that he's potentially shorting the amp output to ground.
I don’t think the current nor voltage is high enough to cause any problems
@@ilpatongi stick to cars dude!!
Luis Niels Stick to being useless
No one cares
You got a *Silver Button!* Congratulations, man! Been with you since circa 20k subs. Keep up great job!
You really should have tapped the line out before the amp, not after, as that's what a line out *is*. Of course the signal after the amp was stronger, that's what amps do! With the way you've done it, it would have been simpler to just plug the output into the line in on your computer and plug your headphones into your computer. No mod was necessary.
My thoughts exactly. The amp was designed to drive into an 8 ohm load not be used as a line out signal. Taking the signal before the amp is the way to go as it's designed to run into a higher impedance load. A line input is specked at 10K ohms.
Bravo. Your comments are spot on. Tapping the signal before the amp give you the best wave reproduction therefore leaving headroom to be further use via en external preamp. He could have skipped the mod. However he did indicate that he just wanted to be able to hear the speakers while plugged into a stereo.
Wow, I had this exact keyboard when I was a kid, hearing that demo track just brought back a flood of memories. It wasn’t much but it certainly gave me many hours of enjoyment.
Thanks for showing us this! 👍🖖
0:54 imagine being rick rolled by your own synthesizer
You finally got a step bit! 😃 The old drill and switch to next larger bit approach was killing me. 😂
The casio branded one had a rick astley demo tune? DANG, I wanted you to rickroll everyone...
Near Rickroll. The demo tune on a CA-100 is Together Forever, Rick Astley's only #1 hit in the US.
I hate to correct you, David, but this appears to be a rebranded Casio CA-110, not a CA-100.
The demo tune is a dead giveaway, and is about the only difference between the two...
I had this exact keyboard when I was a kid. It was actually branded Casio but had the same demo tune as yours. Oh, the nostalgia *.*
Just re-watched this vid, and I realised something...
You said that the keyboard "doesn't have a headphones output or anything like that", but it actually does. hehe
imgur.com/a/FuTyk
imgur.com/a/UWUm2
It even connects from the speaker-level output, so it's definitely intended for headphones, but also already has a cap for AC-coupling (DC blocking), plus some 120 Ohm resistors, for limiting the max output slightly.
Or, for a cleaner line-level output (ie. bypassing the amp altogether), you could still tap off the signal on the "volume" side of capacitor C36...
imgur.com/a/qnj4z
The realistic concertmate line is surprisingly good. The concertmate mg-1 is a real powerhouse
That's because the MG-1 was made by Moog, and is basically a Moog Rogue in Realistic clothing!
I wonder if Death Grips sampled that 'Cosmic Sound' patch, even indirectly. I vividly remember a sound incredibly similar (likely processed) in "The Fever (Aye Aye)" near 42 seconds into the song.
I love glass harmonica, it's like an intro to an 70s Sci-Fi movie
@ 8-bit Keys I have the Casio CA-301, CA-401, CTK-100, CTK-120, CTK-130, MA-101, MA-120, MA-130, and MA-201. All of those keyboards are based on the same sound chip as the CA-100. I also have the Casio CT-400, CT-840, and MA-220. Those three keyboards have similar sound hardware, but a few of the sounds are different from the other afore mentioned models. For example, the piano sounds more realistic on the MA-220 than on the MA-130. I also have in my vintage portable electronic keyboard collection the Casio CTK-150 and one of its bigger brothers the CTK-300. Both keyboards have a lot of the same sounds as the other models mentioned above, but here some of those sounds improved resembling what they’re supposed to be, such as the trumpet and the harpsichord for example. However, some other sounds such as the accordion and the bagpipes didn’t improve at all.
11:16 The Casio Ca 100 / realistic concertmate 670 has 5 bass species, namely 29 = slap bass, 30 = elec bass, 31 = WOOD bass, 32 = snare bass and 69 = synth bass, in which the lower seven keys as drums act. Nowhere in the operator instructions is this function documented!
I am always impressed by the large chunks of your videos that you record in one cut, like you did at the ending of this one.
I think the inverted signal sent to the speaker is called a balanced output signal. It's made to eliminate electrical noise during the transmission of the signal. I guess that's why you get a better signal from the speaker.
it's called a bridge-tied load configuration, and he correctly identified the reason this was done at 5:27. it has nothing to do with common-mode noise rejection in this context.
the audio rip using the inverted signal as a ground reference should be 6dB higher in level than the chassis-ground version.
@@technology4617 Okay thanks for the correction, It's configured that way to amplify the signal and not to correct noise if I understand. It would only cancel the signal if it was not inverted.
9:46 Ding fries are done, ding fries are done.
Junk & other stuff how is this song called?
Carol of the Bells is the proper name. The thing being referenced is usually called "Burger King guy" or something like that.
7:28 I think because the voltage provided to the speaker is around 2V.
If the speaker is 8 Ohms, it will run at 2.25W.
If the speaker is 4 Ohms, it will run at 2.5W.
They basically cut out a poweramplifier, and just installed a cheap speaker on their line signal; since every system actually has a soundchip, a line amplifier (for line out), and a power amplifier or two.
It's probably an FM chip.
9:38 I think they just dual layered instruments, causing it to sound like it was an octave higher. Yamaha Clavinova has the same problem with layering samples.
13:43 Even with professional instruments, I end up only liking about 10 good sounds out of 500 bad ones.
The sounds of this keyboard bring back so many memories to me... I had the Casio MA130, which has almost the same sounds, but has a smaller keyboard. I even did some multitrack recordings with my dad's stereo reel to reel by recording off one channel to the other and adding a new instrument every time. (I also used it for some echo as well)
I don't think you mentioned the capacitor value. What about non polarized?
why not non-polarized cap?? 1uF MKT is like 0.2$
In software like Reaper (or any recording software really) you can turn "monitoring" on a track to listen to what you're recording.
yes but it sounds different coming from PC connected speakers/headphones, compared to the keyboard itself, and some professionals would definetly notice the input lag vs hearing the sound, and it would be disruptive.
in this case, which is recording toy keyboards, i don't think that would be a problem at all.
Audacity also has a play though option.
bpc7 But going through the computer creates a delay, which will mess up his playing.
Ryuhouji No it doesn’t, that’s what professionals use actually.
Every DAW does this and the delay is so small you will never notice it, especially an amateur
Scored a CA100 from Value Village today. Only $4.99 Canadian and works!
Holy crap I had this! But the Casio version. I rickrolled people before it was a thing 😂
OMFG GUYS 8BIT KEYS HAS 100,000 SUBS LETS CELEBRATE!
I had a keyboard like that once, I think it was the same model as the one here I can't quite remember, but I do remember those same low quality sounds (I even sampled every one of them for some reason), I think it also had the same demo song.
I like to use a dual headphone jack, then I wear two pairs of headphones at the same time so I can hear the recordings I've already made and the recording I'm making currently.
"Laptop or computer"? You have GOT to be kidding us, Dave! No, you didn't just say that nonsense! Ohh, you did! I can't believe it! Laptop (computers) ARE computers!
(You need a text card here that says something like, "Oops, I meant 'laptop or DESKTOP computer', or just 'computer'.")
Text cards aren't a thing anymore
It really doesn’t matter dude
In the CA-110 will get anti-rickrolled when you press the DEMO button om keyboard that plays Together Forever by Rick Astley, but not on the CA-100 Just like Nightbirds by Shakattak from your MT-240 and CT-380.
13:42 - Don't call me Shirley.
Congratulations on 100k subscribers here on 8-Bit Keys
if you use a di box you can record from the speaker level output safely.
I recognize a lot of sounds from my SA-21. But since it is younger it has a much better piano and e-piano sound. Strings, brass and bells though seem to be the same. Also the drums are very similar.
Ok, i like sound of this shitty cheap Casio so much that i found Casio CTK 120 here on one czech site with used items. It luckily seems to be the same instrument just in a bit more modern case - same sounds, same buttons just different look and two speakers. BTW - it´s 8 voice polyphony keyboard - doesn´t matter which sound used. Just need to press "Poly/Texture" to change mod.
It's exactly like a Casio CA-110 I had in 1994. Even the demo song is the same.
1/8 jack is becoming the standard even from korg akai etc. not a big deal as long as your cables/adapters are decent.
I had this keyboard, but then the audio stopped working and I threw it out. its a shame, I really liked it
Hey David, another great video! I was wondering, do you capture your (keyboard) drum lines and then loop them in your software or literally play them all the way through the song? I don't think I could get through an entire song without a mistake if I had to hit those keys for the drum track.
I remember that Realistic branding thing. I am a big fan of Koss headphones and many headphones under the Realistic brand were actually Koss; you could tell because the Koss logo would be there, understated, somewhere on the headphones.
PedalingPrince the Pro 35s were the best! Was glad to find the Koss version on Amazon after my last pair of Pro 35s got broken.
11:59 you can hear samples from both Death Grips songs Hustle Bones and The Fever (Aye Aye)
lol i noticed that too
I've got the Casio CA-110. That's the same demo tune as the CA-110. The sounds are all the same but the CA-110 puts them in a different order. The Keyboard sounds are first, then Wind, then the 2 columns of String and then comes the Brass. Everything else is in the same order. This all puts the default sound on Piano. The CA-110 also claims Pulse Code Modulation. I also like the colors and additional graphics on the Casio CA-110 better.
That actually sounded absolutely terrible. I remember Casio slapping Pulse Code Modulation labels on everything back in those days. If it was, it is using a sample rate you'd expect from telephony.
666th comment lol
If you use/have access to a PC use a basic USB 2.0 sound card. You can get basic models and ones where you can switch between mic/line in and they are an absolute need for someone who has a laptop with a single multi use 3.5mm jack I/O.
You could probably get one on Ebay for a few dollars.