Yamaha PSS-100 Review & Output Mod
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- เผยแพร่เมื่อ 2 ส.ค. 2024
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The PSS-100 is a small square wave toy keyboard from 1989. It's an advanced version of the PSS-80 and PSS-125. It has 32 mini keys, 16 styles, 16 instruments, a voice variator and a digital recorder. But it has no audio output. I will show you how to install one.
0:00 Introduction
1:24 A Look Inside
3:00 Output Modification
7:48 Instruments
11:40 Accompaniment
15:46 Digital Recorder
18:22 Final Performance
Listen to some tracks on Soundcloud:
/ user-229361059 - เพลง
![Cheap, Vintage Yamaha Synths are the Best! [PSS-100, PSS-11, PSS-380 Electronic Keyboard Demos]](http://i.ytimg.com/vi/jn6wLaQYrR0/mqdefault.jpg)
![เจ้าผู้เดียว - ดิด คิตตี้ [OFFICIAL MV]](http://i.ytimg.com/vi/q0NLCYKBOTo/mqdefault.jpg)
'im no electronics expert by any means' *brings up a blueprint for the sound chips and wiring diagrams for the unit*
in the hands of an expert any instrument sounds awesome greetings from the ancient megalithic city of TIAHUANAKU BOLIVIA
Thank you for your respect for the basic (almost forgotten nowadays) principles of a REAL, IN-DEPTH review - so detailed, so thoughtful, so organised, so well narrated, so nicely edited, and so honest. Thank you for your respect for viewer's eyes, ears, brain and ...time. Your attitude and the content which it lives in represent what I would call THE HEART of social media. Subscribed with pleasure!
This keyboard is a must have for every chiptune lover
I know, it's so underrated
VIDEO GAMES!
I had the PSS-80 and I sold it to the kid across the street in my old neighborhood. It was an amazing little box and I hope it served him well.
The recorder is brilliant. I didn't know that a toy keyboard back then had such sequencer controls. Had to comment in an attempt to support your incredible video and channel. Greetings from a regular Casiotone MT-240 player.
Kudos for the 110% creativity level in your videos! Sounds smashing!! 🤘🏼🤩
this little thing was used in most pop hits in the late 2000s and early 2010s. songs like kesha's tiktok, katy perry's california girls, 3oh3's dont trust me, and much more
It's good to see your channel getting some activity! Excellent refurb & review as always!
Thank you for the wonderful albums on bandcamp, I hope this channel grows to the millions of subscribers it actually deserves :)
Very good! Just some ideas: To remove the "beep" sound you need to disconnect the wire that goes to the CPU, removing the capacitor 470pF would do the job. To reduce the volume of the output, the better would be to make a voltage divider with two resistors, not only one.
Thanks for the tip!
Yep, the beep pin is still connected to the jack via the cap on the amp input. Removing the other cap directly on the beep pin will do. But maybe it's better to remove just the leg going to the amp, and connect it via a 20k or so resistor to GND just in case the chip needs some AC impedance.
I’ve just tried this... and did’t work. There are only two 470pF on the board, and none did the trick when removed.
The output mod did work.
Can you post any aditional info or pics?
Many thaks for your videos, just great!!
Wonder if possible to change the pitch. Would be sick to have a little knob to change the pitch for whatever song yr playing.
I think I could never thank you enough for this video! ♥ I still keep mine from 1994 when my dad bought it for me. It has been with me since Im 4 years old,
and even though I'm not good at making any music, I have always enjoyed it and the samples have been a companion trough my life, I think I can recreate all of them vocally or whistling haha, now my sons enjoy it too. It still works pretty well but some time ago my brother broke the first white key. Ive been looking online for this model keys but no one sells them of course. I just found another PS100 (here in Argentina) that Im willing to buy to restore mine since the one on sale has te outside body broken but all the keys are fine. Im really happy to found your videos, they are amazing. Greetings from Buenos Aires!
Because of your videos I finally gave my PSS-460 and PSS-580 teardowns and services and got them all working right.
Thanks :)
Been loving your videos ever since I got an shs-10 a few months ago, keep up the great work!
Excellent review. Clear, deep, well played. I'm waiting for mine! I bought one a few days ago on ebay.
jesus man, those videos of yours are so great I can't stop watching (instead of working!)
Great video! This is one of my all-time favorite keyboards. Its sound reminds me of retro video games and it’s a blast to play.
I like the vibrato effect and the fantasy tone. Thanks for the great review!
Hi Keen on Keys! Just discovered your channel and I definitely think you deserve many more subscribers... Keep it up!!
great review ! i found one of this and in few days im going to buy it to and to make output for music making ,thank you
Excelent video/demonstration!! Keep them coming 😁 and Thank you! 😉
Excellent work.
I love these little yamaha pss keyboards I have a Pss 270 myself that I found in a rubbish dump. So much potential out of them
Hey thanks for the tutorial and schematic, great videos!
As always, awesome 👌🏻
Thanks for the great review and the mod. I just got this keyboard for 25€ and will do the audio out mod too.
sehr guter Kanal. Danke für deine Inhalte
Thanks! This helped me put an output jack on my Yamaha PSS-6 : )
You are unmatched (along with weltenshule table hooters guy) when it comes to us consumer level home keyboard collectors and users. Thanks for breaking down the output mod in such simple terms. Would love to see your take on the Casio MT-520--- it's a super drums unit, and the drum machine has many variations for all style, as well as mutes for specific drums/groups. Very versatile and fun instrument. I'm fairly certain it is at least partially based on squarewave synthesis.
Great channel! Thank you!
Arnold? Is that you? Incredibly review, by the way!
great, as always.
there's a simple filter between the sound chip output and the amp to smooth harsh digital waveforms - it's easy to drive it out (or to make it optional) for the "good direct sound" to pass through the amp. it probably is not a very good idea to take signals directly from the sound chip by wiring it to the jack. the already mentioned voltage devider is one resistor in the signal way, then another to ground. if they are equal then the output is a half of input, if first is 2R and the second is R, then output is 1\4 (well something like that, and that's how volume regulators work). as the native "volume regulation" is effecting the structure of the sound, just a pot in place of such resistors is a good idea for additional real volume regulation. or better a pot for the speaker and after that also fixed resistors for the output jack.
Nice vid! Brings back memories. I had this neat little keyboard many years ago when I was a kid. I eventually through it out with the rubbish. Ugh 🙄
wow thats pretty better than the pss-80 that I own. BUT, surprise surprise, the test mode works the same way so you have access to the drums. Thats super cool!
I keep my eyes peeled for the 100 as it is probably the best of the lot but a bit harder to find. For now, I have the PSS-80 and the PSS-140 that you mentioned.
Some nice sounds can be had with that voice-variator. Im going to buy one for my Niece as she was really into my PSS470 today :D
I tried the startup trick on my PSS-80 and it works as well! Seven of the eight Voice buttons turn into drums.
Wow, this thing looks like a chiptune monster machine!
Exactly. I've bought it for chiptune music, there are no better options for this at the moment
Theme tune of the Rockford Files !... didn't think I would hear that today.
Well spotted David, I completely missed that. Happy New Year to Keen On Keys and everyone else.
You're born to be keyboard presenter
Ficaria feliz ,se falasse português. ...De que serve ter um e não saber usa-lo.....
I loved It!
To disable the beep, take out the 470p capacitor on pin 15 of the CPU. It is coupled to the same path that the soundchip puts its signals, so it will bleed through. You also circumvented the filtering that happens before the signal enters the amp, so of course it's going to sound different. To get a more comparable signal, take the amp's input on it's pin 1.
Many thanks for the tip! I will try that!
@@KeenOnKeys Please let me know if you were successful :)
Show!!!! 🇧🇷😍🎹
sounds like 8bit RPG game OST ^^
Test-mode drum-machine hack!!! 10/10 :))
this synth is clearly underatted
That 16 beat tune you did with the accompaniment sounds like a rhythm heaven practice song lol
Yeah, I saw on the schematic you shown, that the beep wouldn't go away because it's basically wired to that same pin with no parts in between, like a diode to keep the signal from reaching that pin.
For me this one allways seem to be good in many styles of music, since it has very simple sounds and is possible to edit like a real synth, but for kids I imagine you could use this in both metal, goth, new wave and synth pop with a little bit of pedals.
Rarely old keyboard review and repair in TH-cam, you will have more subscribers
oh man, i had one of these as a kid!!!!!D
I have the pss 140 all functions work save for the power jack and it's temperamental on how I feed it battery. But once the battery's are in right it sounds really cool.
OMG, it’s been about 30 years since I last heard the demo tune... -_-U before mine got broken.
This tiny music cosmos of a device is printed in my brain.
Back then perceived it’s sound in such a different way than I do now though... btw I’d love to hear it with fx, I bet it can yield some punchy sounds. Also there has to be a way to change the octave of the oscillators
Can you start linking any hardware modifications you post? Have a suggestion on where to buy the jacks? Loved the video!
LOVE THIS! Are there any mods that can be done to a PSS-F30?? Thanks for the great uploads!
to get rid of the beep you can scratch the trace that the sound goes through or cut the pin of the cpu that it comes from.
The "detune" effect is actually pulse width modulation (I think).
Hi @keenonkeys, may I suggest to get rid of the beep noise, you perhaps try removing the capacitor to the left of the cpu beep track. I didn’t get a pss-100 from ebay (seller cancelled), but have a pss 80 and I am going to try removing this capacitor and also hack they keyboard matrix to see if I can get all the 16 sounds of the pss 100. Lovely videos ;)
I have a pss-125 that I want to mod with a power led, output Jack, and add a pt2399 delay circuit :) i'd like to cut out that little blip noise too. But this keyboard looks like a step up from the 125! More cool preset sounds!
Finally just finished modding my pss-125! The output of the pt2399 delay needs to be amplified if you want to hear it through the speaker... so I had to add a LM386 amp to the circuit too.
Just bought pss100! I had pss80 in the past but this one is much better, the 8 additional presets with the variations and quite advanced sequencer.
What baffles me is the lack of the output. Very strange considering all the other features. Yeah i know its easy to make, and i've made the outputs like that in the past, but still, WTF Yamaha.
11:22 - It's Pulse Width Modulation (PWM), but with limited duty cycle
Wonderful Demonstration! I love the way you enlarge logo and model number. Where can I get those fonts which look exactly like the real things on the key!?
That's what I also would like to know. I simply took a picture of the keyboard.
Great videos. Where are you from?
Heh, nice Rockford Files theme there :P
Hey! Those presets are the same or similar to the VSS30 lol! I recognized them when you played the vibraphone. I do not have this model.. I feel cheated
Yamaha Mk100 next, please :)
Where is there a PDF of the magazine scan?
Hello, ive been looking for the service manual of the casio sk-10. do you happen to have it?
It sounds like a Sega Master System 😀👍
Well Sega used a Yamaha synth chip in it. So that makes sense.
@@robbedoeslegrand236 Not in the US master system. The SMS used the SN76489 though
Awesome Channel. Where do you purchase those switch contact jacks from?
www.reichelt.de
Sounds exactly like old videogames
Hi KoK! An amazing and brilliant demonstration as ever! I have the possibility to buy an PSS100…just one question: After doing some recording into the sequencer, is it possible to change with the Sound Variation controls the sound of the instrument for the melody? I think that it is not possible, but did you try it? Thanks again for your videos! 👍🏻👍🏻
No, the variator changes are not recorded and you can't change the recorded voice afterwards
@@KeenOnKeys Thanks for the answer. In any case, it seems a little interesting keyboard. I think that I will buy it…
Can anyone provide a link to a US supplier for that output jack? Thanks! 👍
Piano reminds me of Ultima
I have the PSR-780 but it's missing some screws, do you know where I can buy them?
Just tried doing this mod myself (with the same exact jack) and I’m running into an issue that isn’t making much sense to me. When nothing is plugged in, the sound plays out of the speaker just fine, but when I plug a cable into the output, I get no signal at all.
I thought it could be a soldering issue, but seeing as the sound is still making it to the main speaker, I don’t think that’s the case…
You can't beat the PSS Portasound keyboards.
The 1970s TV show theme at 7:55 was driving me crazy. It took some Googling to figure it out. (Answer is The Rockford Files.)
It sounds like a commodore-64 soundchip
This sounds like a sega master system.
Bummer that it doesn't record the variations. Cool keyboard nonetheless
10:58 Interesting, the mandolin's doing the weird repeating-note thing that one sample on certain toy keyboards does...
I have a question. I have a PSS390 and PSS790 which I love, but they produce a very audible white noise when they're on. I used to also have a hum issue which I fixed by using an isolated guitar pedal power supply, but my guess is that the hiss/static comes from old transistors. I've identified a B1416 PNP transistor that seems to be an audio frequency output stage transistor. Would this be the right one to replace? There's also a MOSFET LM340T5 which seems to be an output regulator with noise elimination characteristics. I have never had to deal with removing a hiss, but this seems like a good place to start, right?
Unfortunately I can't help you with that. I haven't had such a problem yet.
真希望有人能采样这个键盘 出一个kontakt的版本😭
Nice ! Is it possible to put a tonewheel on such keyboards ?
You mean like a pitch bend or a Hammond organ's sound generator? If the first one, maybe. You should be able to basically wedge a pot between the keys and the sound chip, attach the "low" end of the pot to ground through a resistor, and the "high" end straight to the sound chip. (You'll have to boost the input voltage a bit somehow to compensate.) This is really just speculation on my part, so don't quote me on it.
As for the second, that might be a bit more difficult...
The demo song on this keyboard sounds very much like a NES or Commodore 64 game.
I've looked at this keyboard again and again and I can't shake the feeling that I need it in my life. Also, how do the voice variator's "Bright" and "Mellow" buttons affect the sound of the organ? Does it sort of sound like you are adjusting the drawbars/stops of an electric organ as you change the sound using the variator?
no, i wouldn't say that. Also, the sound is always retriggered when pushing a variator button.
@@KeenOnKeys Ok, thanks! :D
You should have way more subscribers than this!
He will have, I'm sure. He does what he promises/announces and he posts regularly...
Yamaha psr 51 please
Is it worth upgrading over a pss-125?
the detuned sound of Honky Tonk sounds like Pulse With Modulation actually. Is that possible?
I don't know exactly how it's done but sounds more like two detuned waveforms.
Sounds like Many nes games use this keyboard or tone generation process
I have a pss80 and i believe is a 6 voice and i believe the pss100 is 8 voice.
Can you record an accompaniment without the rhythm playing in the background?
@Keen On Keys this works for pss-130 just got one and bummed no audio output!! Please help!!
You can add an output just like I did in this video as you can also see in my PSS-130 review.
@@KeenOnKeys ok thanks I'm new to doing those type of things, and going to try to start soldering, cus I got a numark pt01 that won't power on only 1.5 years used and it crapped out. @Numark worst customer service, stay away from their products.
Hi, could you please tell me which signal is the "Amp" one (from your recording of both signals)? That one seems to have better sound. I think I want to just do a mono output and choose the better signal, but I am confused about which one is which. I would preferably like to avoid soldering to that spot on the board, but if that's the best way to get the sound to output clearly, I will give it a try. I just picked up a PSS-100 with a cracked case so there's not too much to lose.
Also, you showed an output jack at the beginning that is capable of cutting the speaker signal when a cable is inserted. Does that enclosed output jack do the same thing? I would like to copy your modification if I can because it looks very clean and I don't want to worry about clearance with a the limited space and the added width and extra exposed metal contacts of the standard jacks. Thank you in advance if you can help me!
You hear both signals one after the other at 6:44. They are not very different from each other, but the direct signal is much quieter. I used the amp signal for all sound examples.
The output jack I used mutes the speaker. It should also be available in mono. For the amp signal make the connections as shown at 4:02
@@KeenOnKeys I think I understand now. Thank you. Just to be sure- does the amp signal come from the point on the chip that you soldered the blue wire to? Or is it the connection that already exists that originally went directly to the speaker?
Yes, it is the latter. You could just solder the cables that were attached to the speaker to a mono jack.
@@KeenOnKeys Excellent! Thank you so much! One more question if it’s not much bother.. If I wanted to turn the mono signal into a stereo (headphone) signal, could I wire the single amp signal to the 2 points (tip and ring) to achieve that?
@@teacher-sean yes
What type of wiring is that? I’m trying to order some and don’t want order the wrong stuff
Just the usual wires you find in any audio cable. I think I used some of an old microphone cable.
@@KeenOnKeys ok I accidentally ordered a stereo output Jack. Will that work?
@@staygolden1298 yes, and if wired correctly you can also use it as a headphone jack. Watch my Casio PT-87 video for more details.
15:10 sounds so NES haha and 17:11 is like Game Boy
WHEN ARE YOU GOING TO DO THE MT-40>>>>????????
There must be some digital reggae you could reference.
I will do a review of the MT-41 (which is the same except for the color)
Keen On Keys I’ve got 2 of each! I wonder if the colouring was a racist response to the popularity in Jamaica.
Almost every single tone sounds like master system or the nes