Restoring TWO Sequential Circuits Prophet 10 synths and stacking them with MIDI (40 Oscillators)!
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- เผยแพร่เมื่อ 1 ต.ค. 2024
- The techs at Bell Tone Synth Works vintage synth repair workshop recently restored TWO amazing Sequential Circuits Prophet 10s and since we also retrofitted both with MIDI, we decided to chain them together to create a 20-voice, 40-oscillator monster polysynth! Here's an overview of what goes into restoring one of them, and a demonstration of the "Prophet 20" in action, also featuring our lovely Hawk HE-2150 stereo tape echo. This is like playing FOUR Prophet 5s at the same time!
Sound demonstration starts at 6:42
(in case you don't care about the "tech stuff")
Bell Tone Synth Works is an electronic musical instrument repair workshop in Philadelphia, PA specializing in restoration and repair of vintage synthesizers and organs. Please email us with synth restoration inquiries at belltonesynthworks@gmail.com.
Website: belltonesynthwo...
Instagram: / belltonesynthworks
Facebook: / belltonesynthworks
Video by Alison and Stout and Darian Scatton, May 2020.
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if i send you my parents can you make them into vintage wurlitzers thanks
thank you for your perplexing comment
@@BellToneSynthWorks When you see how difficult it is to find a beige/red/green Wurlitzer 200, and how expensive they are, you can understand why Fopenplop asks this question.
@@alanhaynes418 I had a red Wurlitzer. Are you saying it was valuable?
@@hot88s23 Heavens no. And if anyone else has any in working condition they need getting rid of, just PM me and I'll "haul them to the dump" for you for free.
@@BellToneSynthWorks I feel like they were trying to say they liked you... Now I'm perplexed...
The world is a better place because of people like you, restoring these wonderful instruments. Love it!
The drones sound better than the shite on bandcamp.
great to see someone who can FIX vintage synths and also PLAY them. It seems to me that there's a lot of passion in this work and I highly respect that
I worked at SCI from 1978 to 1987, this was a trip down memory lane! I built, tested, tuned and repaired quite a few P10's.
Compared to SMT electronics in use today, these were a lot easier to work on - you can actually see the components!
Now I solder under a microscope down to 0201 size components. (smaller than a grain of sand).
That's so cool. I have a SCI MAX here in Australia with a few spare CEM3394s. Much respect to anyone who worked at SCI, I've been meaning to get a hold of the book which explains the history!
Your fellow You Tuber Fran Blanche of FranLab is also in Philly somewhere; she builds guitar effects pedals and all kinds of other unusual repairs, builds and rebuilds. When this insanity is over, perhaps you two should meet. Kindred Spirits?
I was wondering if she knew Fran
Holy moly! 2 Prophet 10's in the same room? I considered myself lucky to see two in the same decade.
believe me, so do I!
chief tp I wish I could get my prophet to make a sound
Someone in the UK also has two. Not me!!
I was just immersed into a Bladerunner-type movie
right there with you
Great play but whatever you did at 11:00 and after is 5 stars! What settings are these, I need that sound ;)
That huge drone had me walking around the house ready to stab a home invader... Monitors full blast of course!
Lmao, made my day 😂
Sounds like the sounds they may have used on "blakes 7" an old British Sci fi show from the 70's.
I was wondering what it reminded me of- Yes good call mate.
@@raheemhosein-isolate333 Yamaha GX1 used extensively by Dudley Simpson on that show! Not sure about P10, but definitely big Yamaha sounds in there. Great soundtrack to those shows!
Haha... Spot on! Great music but the worst not-so-special effects and wooden acting in BBC scifi history. 😂😂😂
Note to self: begin next lifetime learning to play keyboards.
If you can read this post, than it's probably not too late.
I so much agree with you, MirlitronOne. I 'play' guitar, drums, and French horn. I dearly wish I would have learned how to play a keyboard.
@@bubblehead78 Check out a pawn shop near you. You'd be surprised what people get rid of for next to nothing. And there's no time like the present, you know? I have played all kinds of instruments and still do, I took up pedal steel at about 57 or 58. I'm 61 now, and having a blast playing the damn thing. When I'm not playing guitar, bass, violin, viola, mandolin, harmonica, or tapping guitar. Started the tapping guitar at about 53 or 54. The point is, DO IT! You'll have a blast, I am sure. It's not too late until you're dead.
Customer: What's wrong with my computer?
IT support: It suffered a digital-side apocalyptic event. It's common for 40 year old computers.
Customer: Ok then. As long as the internet's fixed.
Just restored my P5 and that was bad enough ;)
i can guarantee there were just a few f&*ks thrown about fixing that thing
I also definitely screamed "WHY ARE YOU DOING THIS TO ME?!" a few times
That was a great troubleshooting story! Your mention of Curtis chips got me reading a bit about them and made me notice how similar some Prophet sounds are to Oberheim OB-Xa and probably other users of those chips. As a complete amateur I'm happy with soft synths triggered from a controller with knobs because they fit my music-gear budget but I really admire vintage hardware. Thanks for demonstrating those sounds which got me to crank my speakers up.
I actually met Dave in the early years. He was building the "Programmer" the "sequencer" and the P-5 was JUST in production - San Jose in 1976 If I remember correctly
Dude … that outro was like legendary …. You are unbelievably talented
I played a P10 for about 30 minutes back in the day. The idea of having TWO of them blows my mind.
Now I can see and hear why Prophet synths were such an integral part of Robert Rich's early to mid-1980s sound palette. Thank you for restoring these two synths. I hope that they get used for many years to come.
It’s so conforting to know there’s people out there who know how to fix these things! Great video!
"My wife likes fixing old synthesizers and playing them once she's done" said the luckiest gear-head ever.
That drone sounds really good. I wish I could replicate it with VST stuff.
If my wife caught me watching another woman touching circuit boards and talking about oscillators and envelopes then I’d be single.
"Sure, Jake from StateFarm. What are you wearing?"
Not to mention touching her knobs
So then your wife wants to be the only woman you watch touching circuit boards and talking about oscillators and envelopes?
please don't make this joke
Ew. Grow the fuck up and expand your horizons, you sad losers. How fucking insulting and trivializing to Allison.
In short, “we might as well manufacture our own synths”.
Great work. So nice to see equipment like this lovingly and professionally restored. Also enjoyed the 40 oscillator drone - bonus.
dark ambient terror music for the covid 19
mission accomplished
Definitely! 😨
I highly recommend Tangerine Dream and Kraftwerk. If you like dark ambient. 🎹🎹🎹
Solid Tame Impala vibes around 10:00!
Currents 💜
Incredible restoration, beautiful synths and lovely playing. Thank you
Why did they change their name from Sequential Circuits to just Sequential?
Very nice Sound...¡¡¡ Stunning reverb...Great Job...YEAH...
You are such an excellent, well versed instructor! Thank you for sharing!
Fixing and playing synthesizers: the best job in the Universe! I'm amazed by Your enthusiasm.
(5.45)minutes it's sound like frankeinstein 's Coffin!!
haha that's amazing
I love how they printed little drawings on the circuit boards of those old prophets.
I played my friend’s Prophet 10 many, many years ago in the 80’s. Loved it. Made a cassette recording while playing that I still have. Wanted to buy one but in those days way out of my range. Was very disappointed that Sequential didn’t make the new Prophet 10 more like this. Would have bought one. They missed the entire idea of being able to play two distinct sounds on two key beds. Even putting out a limited edition of this synth would be awesome.
You're the coolest woman on Earth right now! I wish we could be neighbors...
You know you synth nerds used to come in 2 flavours 1st the minority report ie the atonal academics and 2 the diatonic pop rockers or diatonic tangerine dream imitators but you are neither I'm very surprised to be saying I like your chords.
aww thanks! This is what you get when a classically trained musician enamored with chromatic harmony gets into synths.
Really cool. How did you guys learn how to repair synths, seems so complicated.
Basic electrical engineering
I started studying electronics about 10 years ago specifically so that I could build and fix synths, and eventually learned enough and gained enough experience that I was able to turn it into a business. A lot of what we do is based on the same analog electronics theory and very outdated computer theory that someone would learn to be able to fix any other electronic equipment from the same era. The things that are hardest to deal with are things that theory can't help us with, like weird mechanical aspects of the designs and botched repairs by past techs!
@@BellToneSynthWorks That's awesome.
The real question is where did she find TWO Prophet 10s.
10:07 That keynote! Bzzzz! Gorgeous
Now there is a semi- official Prophet 20 Prototype on Reverb Sale... or is it just 2 x Prophet 10 modded afterwards into one?
Simply amazing. As an engineer, I am very aware of how early power regulator circuits could fail and pass the source voltage b4 regulation and fry many components. That and Tantalum caps add to the headache. I hope you have some good desolderIng equipment like a Hakko or my favorite is Air Vac..
What a headache it must have been to FINALLY clear all of the faults..
Thank you for the persistence, knowledge and labor to allow this instrument to be played for years to come !! Bravo !!
Wonderful job! Replaced almost everything!
But.... isn't is better an even cheaper to by a good , y mean a really good instrument? (With Warranty) Technnics ePianos are amazing ...or KORG.... and voilá ....
extraordinary tech work and descriptive breakdown! judging by the views, reactions and likes this video has well deserved momentum - Subscribed
Wow! I feel like I'm a teen in the 1970s again, amazing stuff! Thanks!
VERY cool, appreciate all the techie details you provide showing how these keyboard instruments were put together! Great work - I know who to contact if I ever need any synth repairs!
Nothing like the CMI FAIRLIGHT V which is powered by a MC6809
Damn, that was cool! 😳 I guess the algorithm is getting to know me. Too well, perhaps.....🤔
Awesome results, love the combinations from the 2 Prophs, that oscillator at the end had a Pink Floydian vibe to to. Did they use it on'Welcome To The Machine'? Eerie....
Great work bringing these back to life. There was also a single manual P-10 but I've read they would have heating problems. BTW, does the modulation work through MIDI on these?
Nothing more fantastic than a HOT woman knowing her stuff! You are awesome, Im jealous because all I can say now to my boyfriend..hmmm okay honey so thats that Prophet 10 in your studio, whereas he will probably say, Yes sweety I know..I can read whahaha lol! You go gal!!
Thanks for the walkthrough, I appreciate the tenacity required to wrap your head around the circuitry let alone coming up with a strategy to tackle the repair. Ever use an IR camera to determine the problematic IC's/ discrete components?
I would love to get an IR camera, I've seen Markus Fuller use one in one of his videos and I was jealous!
I had my 1964 Farfisa Compact restored recently. It was in the shop six months. Thanks for explaining how difficult this kind of work is. Labor of Love ❤️
In UK or USA?
these toys are just useless earbreakers ...what a waste of material that could be used in the medical world for example ...and the sound brrrrrr.....save me.....
The foundation of Tony Banks's sound all through the 1980s and into the 1990s. Amazing--Pratt-Read keyboards used to be made in my little village!
There's a moment in his music video for This Is Love where he nearly drops his Prophet 10 and it's terrifying to watch
That would be Ivoryton, Connecticut?
I used to deal with Pratt-Read a lot. They made all the keyboards for the American synths, SCI, Moog, ARP, Oberheim, EMU
You must be in southeastern CT, once the ivory piano key industry hub.
rowan cotton I would carry mine up and down a spiral staircase, praying I didn't lose my grip or stumble. Not fun.
Such a wonderfull synth!!! Vangelis used to play one of those, thank you!!
Hi
I am a composer seeking to find a very nice analog synthesizer to Learn.
I just Love the sounds of synthesizers.
“A digital-side apocalyptic event the likes of which we’d never seen before.” Lol. Oooo, this is getting good!
Who are the six sad sacks who gave this wonderful video a thumb down? Let me guess, they're panicking about static.
behringer ceo and his personal assistants
I wanted to be a musician but my parents told me I had to study electronics engineering.......
Excellent vid. In a future video could you provide some insight in how you actually go about desoldering IC's?
a good idea for a future video!
If you need help with that you should be studying more basic repairs and leave synths alone, thanks.
I assume she uses a vacuum operated, pistol type solder-sucker with separate vacuum pump, like a Hakko or similar. I was an audio repair tech for a number of years; the Hakko desoldering guns at the shop were getting finicky and parts are difficult to find, so we switched my bench rig to a relatively inexpensive "AOYUE" (pronounced Eh-You) desoldering pump, which actually works very well. The pistols or guns are a bit cheesy, but they're very inexpensive, so buy a couple extras (easier to swap out the entire gun than changing the heater core). Their newer-style desoldering tips with a pipe-nipple or tit on the end are long-lasting and work well. Model number is " Int-701a++ " if I remember correctly. It includes a pencil-type soldering iron as well. Unlike our aging Hakko units, I've not had to do any repairs to the vacuum pump after 5 years of daily use. The solder collection chamber/ filter works best with steel wool and a felt filter, like the old Hakkos used, as the sponge filter and springy solder collector provided with the AOYUE unit don't work very well .
@@BellToneSynthWorks , yeah, I second the motion! Also see my other post on the subject....
Huge thumbs up! Amazing restoration!
Good information thanks for posting. I always heard about the problems with prophet 10's. That's a real labor of love getting to those up to working order again.
I didn't know I needed a Prophet 10 to survive in life, but apparently I do.
Your playing is amazing. What is the piece you are playing?
Play a versión from the man Of steele.....plase.....????
This is fantastic. You’re an awesome person. Brilliance meets art.
please do not upgrade your video camera or editing aesthetic, this feel like its from 20 years ago and it's awesome
Haha! All of my videos so far have been filmed with a camcorder I bought used a few years ago that always seemed surprisingly bad until I recently realized that it was made in 2007. But then, I found out that I could just put a bigger microSD card in my 6-year-old smartphone and use that to record my videos and have them look 400% better, so, sorry, but that's gonna happen. CUTTING EDGE, HERE WE COME
Would love to see more videos on these synths! Do you still have them ?!
That is a beastly synth! You could add some wheels and drive it around.
"Honey, I'm taking the Prophet to work.'
"Okay! Don't forget the camping gear in the trunk!"
Wow...this is just so good and i/we want to here more pleas,next two CS80s in midi together ;)
Thank you for this video and for posting videos again in general. I am very much looking forward to more content from your channel! I'm at a loss for words for 2 prophet 10's in the same room. I really believe instruments have some kind of weird destiny thing where they are alive and seek out the right owners and doctors, in this case.....Wizards!
I need capacitors or a power supply on a Baldwin fun machine
I had a Prophet 10 years ago, between that, my Yamaha CS80 & DX1 ( yes I actually owned one ) my back has never forgiven me ( by comparison my PPG wave 2.2 and waveaterm A where lightweight ) 🤣🤠 I also owned a Chroma and three (3) Voyetra 8s, an OBX, OB8, Oberheim 4 voice SEM, MemoryMoog & Jupiter 8 & 6
Congrats you HAD a nice retirement fund circa 2020! All those are now high ticket "collectors" treasures.
Close Encounters of the Third Kind @7:05?
the composition are yours? I'd like to hear more , thank you
Sounds like a Tony Banks solo effort.
Two synths created by the guy that created midi now retrofitted with midi, he forgot ! But, the new stuff has it all in that updates of decades. Pretty cool stuff, but I'm sure a monster of a tediously rework...although I do think you don't actually find it tedious but enjoy it. So is it prophet 20 now? Hit the volume, beef it up like the old Maxwell tape commercial of sound blast...also nice playing.
The Prophet 10 is actually from before MIDI was introduced, but rest assured, Dave Smith released MIDI retrofit boards for his past synths, including the Prophet 5 and 10, once the protocol was completed! The MIDI board we used that we got from our friends at @RosenSound is actually a copy of the original SCI Prophet MIDI retrofit board.
@@BellToneSynthWorks Cool, I figured some of his synths were before his midi intro. It was some history I learned some years ago about competing synths and he being the zen guy ( notice of the buddha imprint within some of his synths) wanted a communication interface among them all, or " let's all get along intro interface" keep it zen man...but of course, it also means a good reason to buy more & establish control change to other modifications good times; synth comprise work parties? I did not know about that he already introduced retrofit for his older models, and keeping it vintage you got the original stuff! That's pretty neat
Ahhh...thanks so much for reminding me of the great time I had with my SC Pro One all those years ago.
Wish I still had it.
Excellent repair job! I once repaired a Polymoog where one broken UA741 took down the whole synth. Its those repairs you‘ll remember forever 😅
You just made the jaws drop and eyes go crazy for every synth afficiano, geek and nut who instantly clicked on the vid link!!! 😱😵😜🎉🎊
I'd offer a kidney for ONE Prophet 5 in my studio, and you have TWO Prophet 10's in your living...
It will only cost you 4 kidneys!
Awesome and very nice job. Would love to hear more and see more synths!
Reminds me of my days at EV in Buchanan repairing mixers, amps, EQ's, x-overs and so on.
Yes. The IDC ribbon cables cause many problems.
That was a wonderful time for music and hardware development.
They worked wonders on my SP-12 a few years ago!
That drone at the end is the greatest thing I've heard. It's elemental.
Amazing work! Congrats! :D
FAR OUT!!!
nice work and great trouble shooting
What an amazing work! it sounds sooooo good!!
I thought at 11:20 - 12:16 she was going to turn toward the camera with like a skull face or some other monstrous, scary look like in the horror films.
Very, Very Impressive. Well done!
Ace repair shop. Made my Juno sing!
Great video! I'm glad i found this channel as an audio enthusiast and electronic engineering student.
Great video..i have same situation with my P10.. i need info on (R3047) resistor value in +15V supply line board 3..mine burning too, can't identify the value.
The one that had the really bad meltdown came into the shop first and when we had to replace the resistor it had already burned to the point that we couldn't read the lines, I just guessed based on similar applications of resistors I'd seen and put in... I think... 100 ohms? and it was fine. I think then when the other one came in where that resistor was still OK, it had 120 ohms there. However, I could be remembering wrong, but at the same time, I know the value isn't terribly critical. It WILL continue burning in any case until you fix whatever is drawing too much current through it. Look at what ICs are connected to the 15V supply that's separated from the main rail by that resistor, it's gotta be one (or more) of those. You can remove ICs and/or cut traces to narrow down which one(s) it is.
I wanna see the movie to this soundtrack!
Thanks so much for taking the time to share some of this arcane knowledge. Amazing work as always!
BTW... When I learned that Tony Banks of Genesis owned and used one, I had since then wanted one, too! 😁
I have a prophet 5 and a prophet 600 don’t know which Rev. probably not a 3. Maybe a 2. The prophet produces no sounds however the lights work. Would you help?
Perhaps we can! if you're interested in possibly sending one or both in for repair, you can email us at belltonesynthworks@gmail.com.
Absolutely amazing work and a magnificent video - thank you. I've just received my restored and (Winecountrysequential MIDI-fied) Prophet 10 back from Kent Spong. Owner of two T8s too. Passed through some chorus and a modern reverb, they are all immense.
2 T8's eh? Wow. I hosed mine last year while re-socketing chips on the digital board... :-(
This video is my exact niche. I would love to see much more of your work!