Yamaha RX21 - A Vintage Drum Machine that Promises Realism

video upload by Manitou Productions

"In 1985 Yamaha released the DX21 Digital Rhythm Programmer, promising the drum sounds were 'indistinguishable' from the real thing. We know better, don't we? That doesn't mean we can't enjoy the RX series of drum machines for what they are: fun and simple beat boxes that still have something to offer in 2026. Let's go!"

Chapters: 0:00 We don't want it that fast! 0:09 Titles 0:17 Intro 0:33 A quick look at the manual 2:22 Wedge shaped 2:36 Ins and outs 3:30 Adapter 4:04 Let's turn it on! 4:48 Sounds! 5:36 Some patterns 6:25 Tempo 8:41 Let's open it up! 9:42 Battery test 10:00 The button matrix 10:56 Cleaning the carbon pads 13:39 Partial reassembly 14:05 The circuit board 14:59 Adjusting volumes 16:52 Recording a pattern 20:27 Playing it through the Rev7 Reverb 23:17 Outro 24:22 Ivy's Corner

EMS 256 Sequencer repair Part 5 Finale

video upload by Really Nice Audio

All parts

"Join me in this final video restoring this EMS 256 sequencer.

Watch me fumble around until I finally get the I/O scaled correctly!

Thanks to PCBWay for making the extender boards https://www.pcbway.com

This sequencer is part of the Pete Townshend Studio ay the University of West London.

https://www.uwl.ac.uk/study/study-fac..."

Soviet RITM2 Repair

video upload by Really Nice Audio

"Join me on this nice repair of a RTM2 soviet era synthesiser.

The music in the video is from my ATMOS album 'Height Supremacy'.
This track has plenty of my own RITM2 on it.

When the power supply fails a great substitute is the Velleman project
https://whadda.uk/Item/velleman-k8042...

And if you experience the pitch gong flat no matter how you set the calibration, adding half a volt to the positive power rail can really help."

1988 Studio Electronics MidiMoog Vintage Mini Moog Model D MIDI Analog Synthesizer

Note: links to listings are affiliate links for which the site may be compensated.

via this eBay listing

"1988 Studio Electronics MidiMoog Analog Synthesizer

100% All Original MIDI MiniMoog Rack Mount Synth

Factory MiniMoog Model D Circuit Board!

For your consideration is this vintage 1988 Studio Electronics MidiMoog analog synthesizer. This excellent 100% all original example is in perfect working order. It appears to be a pre-production example, having never been adorned with a serial number placard. Not many were produced, but the Studio Electronics MidiMoog features an actual Moog Model D circuit board within!"

Pics of the inside below.

CLICK FOR MORE »

Sequential Prophet VS With Controller Rackmount 8-Voice Polyphonic Synthesizer SN 0275

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

"With its controller, and exceedingly rare cartridges, this Prophet VS is a very clean example of a pretty hard to come by synthesizer. It was recently given a clean bill of health by one of our in house techs, and it sounds excellent."

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EMS 256 Sequencer Repair Part 4

video upload by Really Nice Audio

All parts

"In this episode we edge closer to getting this legend back in full working order. Now I have my extender cards I can probe the circuits and start debugging the rest of the faults.
After checking around the recirculation circuits and shift registers I decided to remove the 'Time Extender Board'. Now it plays back recordings!
I have to do some more research on this board in the next episode.

Thank you
https://www.pcbway.com
for making the extender boards. They were perfect!

This EMS 256 is part of Pete Townshend synth collection at
https://www.uwl.ac.uk/study/study-fac..."

Roland Super JD-990 Sound Module SN ZE50179 w/ SR-JV80-04 Vintage Synth Expansion Board

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

"With expansion on board, and some truly wonderful sounds at your fingertips, this Super JD has been tested and is working great."

CLICK FOR MORE »

KORG KLM-1884 PBS-Tri Sampler Flash ROM for Korg Trinity Series

Note: links to listings are affiliate links for which the site may be compensated.

via this listing

Additional Perfect Circuit listings

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Korg MOSS Board EXB-Moss DSP synthesizer expansion for Triton

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

"Excellent condition. Works perfectly.

MOSS board for Triton and Korg KARMA

Removed from Triton Extreme and stored in anti-static pouch as shown."

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Oberheim SEM 1977 via 360 System Spectre

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Pics of the inside below.

"These used to be a somewhat well kept secret, obviously no more. But if you're not familiar with the 360 Systems Spectre, it was a pretty terrible GUITAR synth (slow & choppy tracking) that 360 Systems produced with Oberheim SEMs as the heart of these units.

Sometimes you'll see these listed as being "Converted to full-functioning SEM" but often there's a thing or two that were missed. You have to reconfigure a few jumpers, add a missing coupling capacitor to each envelope generator, add the missing Decay and Sustain controls to the EG on the Amp VCA, replace the input gain resistor for the external input, add shielded wire for the output, change the output impedance resistor and so on. Everything was done to this unit to make it true full-functioning SEM. An original SEM/CPS-1 power supply (recapped) was also installed inside.

I'm also including a 1977 CPS-1 chassis (complete with recapped PSU) with it so if you do find a faceplate, you'll have a complete SEM. My plan was to find or have someone make me an SEM faceplate in the rare black finish. I thought the gray knobs would look killer on the black panel. But tbh, I really liked the portability of the 360 case. Oh well, someone else can enjoy it now. I've used this in my studio for the last 5-6 years. I will miss it but I'm not doing much synth-based music.

-Synth was fully restored 5 years ago with some basic maintenance in the last 2 years

-All electrolytic and tantalum capacitors have been changed

-VCOs & VCF tuned/calibrated

-AC cord was removed from the front and an IEC was added to the rear of the case

-pots and switches were recently cleaned

-Sub OSC ckt. was added (non-invasive, made by Pete's Gear Garage in Sweden, uses 'Guitar' knob in mixer section)

-Each Jack on the bottom row has a function such as Hi & Low outputs, CV & Gate in, Ext. Input, LFO retrig, VCF in and out (for use with modular) and VCF CV.

-I still have the 360 Systems Control board. It was robbed of a few parts but the PSU and the Transpose rotary switch are still on it. If you want it, send me a msg and I'll include it with the sale."

CLICK FOR MORE »

Vintage ARP Quadra 2463 Analog Synthesizer & Keyboard SN 24630157

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Pics of the inside below.

"Tested and Working. This was pulled from a working environment. Please look at all pictures before purchasing, only what is included in pictures is included in sale."

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EMS 256 Sequencer Repair Part 2 Re-Cap circuit cards and devising a plan.

video upload by Really Nice Audio

Really Nice Audio EMS 256 Sequencer posts

"What is the likelihood due you think I will get this sequencer fully functional? I am now able to see the memory fill up when using a key input. The hardest thing for me to work out was a strategy for the repair. Considering how old this unit is will I find many broken logic IC's?

It is hoping to play some music in September, let me know your thoughts below.
https://paymentportal.uwl.ac.uk/confe...

This is part of the Pete Townshend Synth Collection at the University Of West London

https://www.uwl.ac.uk/study/study-fac..."

ARP 2600P V3 (1972–1974) with 3604P Keyboard – Classic Semi-Modular Analog Synth

Note: links to listings are affiliate links for which the site may be compensated.

via this eBay listing

Pics of the inside below.

"ARP 2600P V3 Synthesizer with 3604P Keyboard
Power cable
5 patch cables
Keyboard-to-module cable
Case covers and original manual

Condition:
This unit is previously used and shows normal cosmetic wear consistent with age. It is fully operational, including all oscillators, filters (4012), and modulation sections, and functions as intended."

CLICK FOR MORE »

EMS 256 Sequencer Repair Part 1

video upload by Really Nice Audio

Really Nice Audio EMS 256 Sequencer posts

"Join me in a quest to get this incredible sequencer back up and running.

It is part of the Pete Townshend Synth Collection at the University of West London
https://www.uwl.ac.uk/study/study-fac..."

SN 6014

Roland System 700 Modular Synth Repair | Full Teardown & Service #183

video upload by Synthchaser

"We explore the workings of the ultra-rare Roland System 700 Modular Synthesizer as we repair and service one of only 40 systems ever made!

🌐 Find me here:
https://synthchaser.com/"

Yamaha DX100 Restoration

video upload by Runningonair

"In this video I restore a Yamaha DX100 keyboard and replace the screen with a modern illuminated blue display."

Music/Support:

https://runningonair.bandcamp.com/

https://open.spotify.com/artist/5fNUf...

https://paypal.me/runningonair?

Moog's Extremely Rare Synth- The Minitmoog!

video upload by synthpro

"Hey Guys,

In this video, I take you through the Minitmoog synthesizer. from my understanding this was a one year only model with only a few hundred manufactured.

Thanks for watching!
Jareth"

EMS Rehberg Logik Analog Synthesizer & Keyboard (Made in Germany)

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Pics of the inside and the user manual below. "This edition is rare, and cannot be found anywhere as a set. Made by EMS London, and works differently than the Synthi A, although it appears to be the same. Here is a breakdown of what you get below:

In addition to the power supply, new patch cables as well as the original patch cables (standard mini jack), the lid of the "suitcase synthesis" and the original manual (or textbook) are included.

The modules of the EMS Synthis work perfectly, the overall sound and especially the filter sound very high-quality.

VCO – Voltage Controlled Oscillator • with the vibration forms sine, sawtooth, triangle and rectangle with external control voltage input for pulse width modulation • VCF – Voltage Controlled Filter • Multimode filter with 12 dB slope, low-pass, high-pass, band-pass and phaser • LFO – Low Frequency Oscillator • with the vibration forms sine and rectangle • SRG – Slow Ramp Generator •

with
the vibration form sawtooth • NG
– Noise Generator •
the noise generator offers white
noise • EG –
Envelope Generator (Envelope
Shaper)
• A-D-S-R • RM
– Ring Modulator • INV – Inverter • SL – Slew Limiter (Portamento) • EF – Envelope
Follower • External Audio
Input • Output/Mix
• Control Inputs"

CLICK FOR MORE »

E-mu Emulator III - Service Training Video

video upload by MuStudio

"Here is a video that was shared with me by Kevin Monahan and his wife (she was the one who recorded and edited it at the time).

The main narrator is Tim Swartz, who headed the maintenance department at E-mu Systems.
Hello and welcome to this E-mu Systems Emulator III maintenance video.
To help you better understand and maintain the Emulator III, we have created this maintenance video.
It includes an overview of the EIII, covering both the standalone EIII and its system integration.
We will discuss disassembly procedures, technical modification orders, calibration, and basic troubleshooting."

OAK Sampler - New Ensoniq ASR-10 Inspired Sampler Workstation Keyboard Synthesizer In the Works

video upload by oak sampler

Meet the upcoming "OAK-S37 Sampling Workstation" keyboard synthesizer.

Playlist with additional details:

1. OAK Sampler Sound Playback and Effects Test

I absolutely love the ASR-10. I’m building a new hardware workstation inspired by the ASR-10 that runs the original OS , effects etc and replicates the HW in a modern form. There will be some updates on the project. This is the boot and general test. Potato speaker recording. #asr10 #90ssampling

2. OAK Sampler (ASR-10 in Hardware) Sequencing & Sample Editing

I love the ASR-10. I’m building a new hardware sampler inspired by the ASR-10. It can run the original Ensoniq ASR-10 OS and effects algorithms. This video shows sequencing and sample editing on the OAK Sampler.

3. OAK Sampler (ASR-10 in Hardware) vs ASR-10 Sound Comparison

This video compares the OAK-S37 and an the ASR-10 using the same sequence, individual samples, filters, envelopes, and effects.

I recreated “93 ’til Infinity” as a test project using identical files across both systems.

I intend to do a limited first run eventually (no dates yet).

Credits
TRACKLIB Sample Breakdown Souls of Mischief - 93 'til Infinity
Heather - Billy Cobham - Sampled From Vinyl
The Jam - Graham Central Station - Sampled From Vinyl

4. OAK Sampler (ASR-10 in Hardware) Loading Original Ensoniq Sample CDs

In this video I load projects from the original ASR-10 Ensoniq Sample CD. It shows proper playback of the complex arrangements, accurate instruments and effects on the OAK. Totally 90’s.

Credits:
Studio Essentials Vol. 1 CDR-3 Ensoniq Corp

5. OAK Sampler (ASR-10 in Hardware) vs ASR-10 Effects

In this video it’s shows an comparison of the OAK-S and ASR-10 internal effects.

The second half demonstrates live effects monitoring. One of my favorite ASR-10 features was using it as a real-time effects processor, and I wanted that preserved in the OAK-S. It uses effects from the Ensoniq CDR-3 CD banks

Credits:
Effects from Studio Essentials Vol. 1 (CDR-3) Ensoniq Corp.

You can find additional details and an FAQ at www.oaksampler.com