via this listing
Additional Perfect Circuit listings
Saturday, October 11, 2025
Akai MPC Key 61 Standalone Production Keyboard
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
Akai MPC Key 37 Standalone Production Keyboard
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
E-MU Systems Emax I w/OLED and USB Disk Drive SN 2326
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Just the facts:
1. This E-mu Emax is in good condition.
2. This includes the E-mu Emax itself.
2. This includes an OLED display.
5. This includes a Gotek drive from Monotanz.
6. This includes an IEC power cable.
6. The original power supply has been replaced with a new supply.
7. This does not include the original factory box and paperwork or any floppy disks.
Please take a look at the pictures. As you can see, this Emax is in good condition.
Good condition Emax! Various skiffs and scuffs here and there from 35+ years of faithful service. This Emax functions great: all the keys work, the sliders and mod wheels work, the display has been replaced with an OLED display and is much more readable, the power supply has been replaced with a modern one (much cooler), a Gotek drive is installed and replaces the floppy disk drive, and all of the ins and out work.
I am including a USB key that about 350 disks loaded on it, including the factory samples, third party samples, and some famous samples from an 80s band.
That said, this is an old keybaord. There are skiffs and skuffs on the unit. The potentiometers and digital sliders appear to be in great shape, but there might be some dust and crackles to chase after and clean out sometimes. The audio ins and outs are working without issue, but keep in mind this is a noisy sampler (relatively speaking, compared to 2025 standards). This is old technology, but old technology that sounds AMAZING. But, not noise-free as you might expect from an Elektron device.
Overall, this Emax is in really good shape, and the front panel looks great. A lot of Emaxes I see online, the front panel sticker is de-laminating and peeling off. This one is in super great shape. Take a look!
Please understand this is a well loved sampler from the 1980s."
via this Reverb listing
"Just the facts:1. This E-mu Emax is in good condition.
2. This includes the E-mu Emax itself.
2. This includes an OLED display.
5. This includes a Gotek drive from Monotanz.
6. This includes an IEC power cable.
6. The original power supply has been replaced with a new supply.
7. This does not include the original factory box and paperwork or any floppy disks.
Please take a look at the pictures. As you can see, this Emax is in good condition.
Good condition Emax! Various skiffs and scuffs here and there from 35+ years of faithful service. This Emax functions great: all the keys work, the sliders and mod wheels work, the display has been replaced with an OLED display and is much more readable, the power supply has been replaced with a modern one (much cooler), a Gotek drive is installed and replaces the floppy disk drive, and all of the ins and out work.
I am including a USB key that about 350 disks loaded on it, including the factory samples, third party samples, and some famous samples from an 80s band.
That said, this is an old keybaord. There are skiffs and skuffs on the unit. The potentiometers and digital sliders appear to be in great shape, but there might be some dust and crackles to chase after and clean out sometimes. The audio ins and outs are working without issue, but keep in mind this is a noisy sampler (relatively speaking, compared to 2025 standards). This is old technology, but old technology that sounds AMAZING. But, not noise-free as you might expect from an Elektron device.
Overall, this Emax is in really good shape, and the front panel looks great. A lot of Emaxes I see online, the front panel sticker is de-laminating and peeling off. This one is in super great shape. Take a look!
Please understand this is a well loved sampler from the 1980s."
Studio Electronics Midi Mini with 1977 Mini Moog cards SN 1561
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"This is a great sounding synth as you can imagine.
It has MINI MOOG cards from 1977 installed also with MIDI in/thru and rack mountable ready to go.
This synthesizer has some pretty cool history.
it used to belong to the keyboardist of 'AHA' Magne Furuholmen and it has been recently serviced by Rob Rosen of 'Rosen Sound' in Los Angeles so it is tip top and works perfectly.
SOUNDS HUGE!!!!!!
Down below [previously posted here] is a cool video explaining this killer synth on all the cool added features, it has compared to the original Mini Moog."
via this Reverb listing
"This is a great sounding synth as you can imagine.
It has MINI MOOG cards from 1977 installed also with MIDI in/thru and rack mountable ready to go.
This synthesizer has some pretty cool history.
it used to belong to the keyboardist of 'AHA' Magne Furuholmen and it has been recently serviced by Rob Rosen of 'Rosen Sound' in Los Angeles so it is tip top and works perfectly.
SOUNDS HUGE!!!!!!
Down below [previously posted here] is a cool video explaining this killer synth on all the cool added features, it has compared to the original Mini Moog."
Sequential Multi-Trak 61-Key 6-Voice Polyphonic Synthesizer
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Sequential Circuits Multi-Trak from 1985, including a 240 VAC power supply
This synthesizer was produced in relatively small numbers, making it quite rare especially in Switzerland. The Multi-Trak delivers a super fat, classic Sequential sound at a fraction of the price of its famous siblings like the Prophet-5 or Prophet T8. The basses are punchy, it’s 6-voice polyphonic, and features a great filter along with a super cool analog stereo chorus. The menu system is designed so that sounds can be edited quickly and intuitively, even without a dedicated knob for every parameter you don’t need to read the manual to use it. The Multi-Trak is my personal favorite when it comes to affordable vintage Sequential synthesizers."
via this Reverb listing
"Sequential Circuits Multi-Trak from 1985, including a 240 VAC power supply
This synthesizer was produced in relatively small numbers, making it quite rare especially in Switzerland. The Multi-Trak delivers a super fat, classic Sequential sound at a fraction of the price of its famous siblings like the Prophet-5 or Prophet T8. The basses are punchy, it’s 6-voice polyphonic, and features a great filter along with a super cool analog stereo chorus. The menu system is designed so that sounds can be edited quickly and intuitively, even without a dedicated knob for every parameter you don’t need to read the manual to use it. The Multi-Trak is my personal favorite when it comes to affordable vintage Sequential synthesizers."
Access Virus B Rack SN H10001110
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
via this eBay listing
Nintendo NESK-1 (heavyw8bit) ENTERTAINMENT SYNTH. : Music Series :
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
You can find a demo of one previously posted here.
via this eBay listing
You can find a demo of one previously posted here.
Designing a Eurorack Module interface | Instruō - ceithir
video upload by Instruō
"Hello!
Welcome to a video I’ve been wanting to make for a long time.
Instruō actually began as a video project. Specifically a time-lapse of me designing the original troika module. Ten years later, I’ve returned to that idea with ceithir, a winter holiday project I designed with video documentation in mind.
This video explores the initial design stages: sketching, layout, and concept development. There are vlog sections and time-lapse sequences with new voiceover commentary.
If you’ve ever wondered how an Instruō module design begins, this video captures that process in full.
tilde~instruments
video upload by tilde~instruments
"This is Röntgen
An analog instrument for improvisation and sonic exploration.
It consists of three parts: two oscillators with wave shapers, two random shift registers/sequencers, and a stereo delay.
The instrument is designed so that it can be played without patching. The banana jacks serve to expand the instrument's capabilities and enable communication with other instruments.
There is an insert point between the oscillators and the delay for connecting a volume pedal, external effects, or both.
Röntgen is made to order.
If you are interested, you can find my email address in the link tree.
https://linktr.ee/tilde_instruments"
The filthy way /// Röntgen & Mousse
video upload by Somnambule
"Hi folks!
Enjoy my jam with mousse by @herbs.stones and röntgen by @tilde-instruments with headphones and play it loud! 🖖👽
Best sound with headphones"
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MATRIXSYNTH - EVERYTHING SYNTH
© 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
