Note: Auction links are affiliate links for which the site may be compensated.
video upload by Emily Hopkins
Note the video above is from 2023. It features a previous model. See the listing description below for more info.
via this listing
"Polyphonic drones, light-controlled warping, rhythmic looping - My newest one-off functional art piece, the 'Space Collider.' Built in a vintage snap-on battery testing shell that was modified and flipped upside down. This instrument features a four-channel drone feeding an old circuit bent delay. This resulted in the gnarliest drone machine to date when combined with a joystick-controlled delay to create oscillation squeals, glitch effects, and even looping.
I included a demo from Emily Hopkins. This is for a previous drone machine I made. This one uses the same circuit - going into a delay! So it is a bit more advanced than the one Emily used.
Short demo can be found on my IG page, addpedals. I am also open to trades for guitars if you are local."
Thursday, December 26, 2024
Roland CompuRhythm CR-78 SN 935492
Note: Auction links are affiliate links for which the site may be compensated.
via this listing
Pics of the inside below.
"One owner - Cleaned and Serviced - Fully Operational - WS-1 Available - Original User Manual - 240v
Super rare Roland drum machine the CompuRhythm CR-78. In so many iconic songs including Phil Collins 'In The Air Tonight' and Blondie's 'Heart of Glass'.
This unit has some very minor marks on the wood finish and also some very minor marks on the black finish of the front panel that I've tried to photograph with light right on it. Overall fantastic condition for this one-owner unit.
It also has a 5-pin XLR plug at the rear with a switch that was added a long time ago. It may be an external controller mod (maybe an early MIDI mod?) but I'm not sure what it could be as I can't interface with it.
The only non-original thing is that the tempo knob has been replaced by an Evans knob with red line for similarity.
Internally it is all original.
The unit is fully functional (check the video) and ready for loop/topline creation and sampling.
It's set for 240v (Australian standard) but it's often easy enough to rewire the transformer or replace it if 110 or 100 is required."
via this listing
Pics of the inside below.

Super rare Roland drum machine the CompuRhythm CR-78. In so many iconic songs including Phil Collins 'In The Air Tonight' and Blondie's 'Heart of Glass'.
This unit has some very minor marks on the wood finish and also some very minor marks on the black finish of the front panel that I've tried to photograph with light right on it. Overall fantastic condition for this one-owner unit.
It also has a 5-pin XLR plug at the rear with a switch that was added a long time ago. It may be an external controller mod (maybe an early MIDI mod?) but I'm not sure what it could be as I can't interface with it.
The only non-original thing is that the tempo knob has been replaced by an Evans knob with red line for similarity.
Internally it is all original.
The unit is fully functional (check the video) and ready for loop/topline creation and sampling.
It's set for 240v (Australian standard) but it's often easy enough to rewire the transformer or replace it if 110 or 100 is required."
Roland TR-808 Rhythm Composer SN 124943 w/ Kenton MIDI
Note: Auction links are affiliate links for which the site may be compensated.
via this listing
"It has Kenton MIDI ports."
via this listing
"It has Kenton MIDI ports."
Roland Jupiter-8 w/ Encore MIDI
Note: Auction links are affiliate links for which the site may be compensated.
via this listing
"14-bit Roland Jupiter 8 synthesizer built in May 1982 per serial number. Power is North America 117v. Condition is Excellent +++. I'm not someone who throws MINT around loosely. MINT implies that the instrument looks like it was just removed from the box. This might be the cleanest example on the market in quite a few years. Please examine the 22 high resolution photographs.
I have highlighted any imperfections in the pictures. They are small and require specific lighting to illustrate, therefor they're difficult to photograph.
This Jupiter 8 is functioning perfectly and scales across the keybed as it should. The power supply has been recapped to prevent leakage. Overall this instrument sounds bombastic and euphoric. There is nothing like being in the room with an authentic Jupiter 8.
Encore MIDI is cleanly installed and doesn't disrupt the rear panel. It adds 64 additional memory slots, and also allows for SysEx dumps to backup patches as well as MIDI control of the instrument as expected."
via this listing

I have highlighted any imperfections in the pictures. They are small and require specific lighting to illustrate, therefor they're difficult to photograph.
This Jupiter 8 is functioning perfectly and scales across the keybed as it should. The power supply has been recapped to prevent leakage. Overall this instrument sounds bombastic and euphoric. There is nothing like being in the room with an authentic Jupiter 8.
Encore MIDI is cleanly installed and doesn't disrupt the rear panel. It adds 64 additional memory slots, and also allows for SysEx dumps to backup patches as well as MIDI control of the instrument as expected."
Roland Jupiter 6 Synthesizer SN 343291
Новые прошивки.
video upload by SynthCone
"Собрал две новые прошивки для PicoCore.🎛Желаю вем увлекательных музыкальных экспериментов 🤖 Доступны для скачивания в ТГ: https://t.me/synthcone"
Speak & Glitch GND 1T // a charming synth that puts the “mental” in experimental music // Review
video upload by loopop
TIMELINE:
0:00 Intro
2:45 Overview
5:50 Build
6:10 Workflow
9:15 I/O
10:05 Patch screen
10:45 Drift
12:20 Morph
14:25 Random
15:00 Excludes
15:40 Speech
19:45 Speech filter
20:20 Word loop
20:50 Will it bend?
22:05 Stereo
22:40 Pitch
23:05 Post filter
23:30 Mix/Echo
23:55 Mini looper
24:40 Modulation
25:05 Envelopes
25:50 MFO
26:45 LFOs
27:20 Mod blocks
30:10 Exp matrix
32:00 Note XP
32:40 Drums
35:45 Arp/seq??
37:10 Misc
37:30 Pros & cons
42:10 Presets
Volt MiniPops + Minimarx Petit
video uploads by marcelo malmierca
The MiniMarx Petit is new, the original MiniMarx below is from 3 years ago. Unfortunately the images are small. Click on the bottom image for a slightly larger shot of the original.
"MiniMarx ( Petit Burgeois ) : The first classist analog programable synth. Change the workers as you please."
Volt Crafty Devices eBay
MiniMarx ( Full Knobs For Leaders )
The top of class control at your fingertips.
ONPF capitalism to increase plusavlía."
Volt Progy + VoltMiniPops Orange Jamming
video upload by marcelo malmierca
"Progy a real clone of the legendary moog prodigy with steroids. Added : Midi, 2nd Lfo, Pw, Vcf Eg invert, Vcf_Eg_To_Osc2_Pitch. None of the added alters original"
Volt Crafty Devices eBay
"Minipops : very nice 8bit emulation. Fun !"
Volt Pg300 with Roland Alpha Juno
video upload by marcelo malmierca
"Tweak your Juno to the stars !
Buy Volt Crafty Devices Products here :
https://voltcraftydevices.com"
Volt Crafty Devices eBay
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH