Note: Auction links are affiliate links for which the site may be compensated.
video upload by Alberto Napolioni
Note this appears to be the first PK-70 to be featured on the site.
FREE IMPROVISATIONS
on this absolutely rarity
the FESMA PK-70!
00:00 Melancholy Glitch
00:27 SINE tempore
00:41 Arcadia
01:01 VaporWaving
01:22 Reverse Cascade
01:43 SAYONARA
01:56 Robotronics
FX Used on some parts:
OTO BAM reverb
OTO BIM delay
via this Reverb listing
"The unfindable FESMA PK-70!(a prototype probably)
Features:
Vintage wavetable synth,with effects, custom drums, MIDI & built in speakers, etc
Fully SERVICED by pro tecnician
Comes with its power charger and custom Case."
Tuesday, April 15, 2025
FESMA PK-70 - Vintage Italian Synth (1985) HD
Akai AX80 w/ Anvil Case
Note: Auction links are affiliate links for which the site may be compensated.
via this Reverb listing
Pics of the inside below.
"This synth has some cosmetic wear in the expected places (shown in pictures), showing its age; but all features function as they should for a normal working unit. The keyboard includes a rock solid Anvil case made to the measurements of the AX-80 to keep it safe and sound to and from gigs.
The synth has recently been serviced and checked to ensure proper functionality as per the Akai Service manual.
Fresh 3 volt memory battery installed, all 8 voice output levels calibrated via trim pots, 6 new keys and return springs installed, keyboard contacts cleaned, power supply voltages inspected, all PCB solder joints inspected (any cold/cracked joints resoldered), all ribbon cable connections cleaned and secured, all hardware tightened snug, and a general cleaning inside and out.
All voice chips are the original CEM3372 ICs with matching lot (8425) and type (B) designations. CPU ROM (IC4) is the factory D2764 D chip, noted program version I
8 Voices w/ 2 DCOs and 1 Sub Oscillator per voice"
via this Reverb listing
Pics of the inside below.

The synth has recently been serviced and checked to ensure proper functionality as per the Akai Service manual.
Fresh 3 volt memory battery installed, all 8 voice output levels calibrated via trim pots, 6 new keys and return springs installed, keyboard contacts cleaned, power supply voltages inspected, all PCB solder joints inspected (any cold/cracked joints resoldered), all ribbon cable connections cleaned and secured, all hardware tightened snug, and a general cleaning inside and out.
All voice chips are the original CEM3372 ICs with matching lot (8425) and type (B) designations. CPU ROM (IC4) is the factory D2764 D chip, noted program version I
8 Voices w/ 2 DCOs and 1 Sub Oscillator per voice"
Korg Mono/Poly SN 373070
Note: Auction links are affiliate links for which the site may be compensated.
via this Reverb listing
via this Reverb listing
Red Studio Electronics Analog SE-1X SN 4076
Note: Auction links are affiliate links for which the site may be compensated.
via this eBay listing
via this eBay listing
MTI Auto Orchestra Vintage Drum Machine with Synth Bass, Footpedals and Strings
Note: Auction links are affiliate links for which the site may be compensated.
via this eBay listing
"Have a chance at this amazing, vintage fully-analog groove box. It's got three parts, a CR-78 style Drum Machine with 20 patterns and 9 muteable drum parts. It's got a acid-tastic synth-bass section. A sweet Strings section and a auto-Chord section.
It comes with it's original Volume pedal and Footpedal keyboard controller as well. Works and sounds great, it's a machine that simply brings out your creativity. There's plenty of youtube videos around of them and I think it's a great purchase for a synth-geek or a guitarist looking for that vintage sound."
via this eBay listing
"Have a chance at this amazing, vintage fully-analog groove box. It's got three parts, a CR-78 style Drum Machine with 20 patterns and 9 muteable drum parts. It's got a acid-tastic synth-bass section. A sweet Strings section and a auto-Chord section.
It comes with it's original Volume pedal and Footpedal keyboard controller as well. Works and sounds great, it's a machine that simply brings out your creativity. There's plenty of youtube videos around of them and I think it's a great purchase for a synth-geek or a guitarist looking for that vintage sound."
Moog Matriarch, Super Gemini & OB-6 - cinematic synth performance
video upload by Devin Belanger
"Semi-improvised synthesizer jam on the Moog Matriarch (bass sequence), UDO Super Gemini (poly aftertouch Vangelis brass & arp) & Sequential OB-6 (pads). I absolutely love these 3 synths for in the moment inspiration like this, and have been writing tons of songs with this combo. Here's a little insight into my process of jamming over a simple sequenced progression to find little nuggets of inspiration."
Monday, April 14, 2025
Sequential Prophet 5 and Roland Space Echo | Horror Movie Soundtrack
video upload by Suspect Media
"The Prophet 5 is amazing for horror soundtracks—I use it in almost everything. When it’s processed through the Space Echo, it’s pretty much unbeatable. It just has that perfect 80s sound."
Melbourne Instruments Roto-Control Review: Innovative MIDI Controller with Haptic Feedback
video upload by sonicstate
"We take a look at the Roto-control from @melbourneinstruments a new 8 knob MIDI controller, with unique rotary encoder technology using drone motors.
Introduced at NAMM, the controller's encoders provide a tactile haptic feedback, making them configurable in multiple ways. Traditional end stop knobs, rotary encoders, centre-dent, positive multi-position switches/
Connectivity options include USB-C ports for power management and standard MIDI in, out and through connections. Roto-control supports Ableton Live exclusively for now, but additional DAW support is expected in future updates. Melbourne Instruments hinted at imminent updates to enhance functionalities, including Bitwig support and MIDI merge.
https://www.melbourneinstruments.com/
Key Moments:
00:00:00 Introduction
00:00:28 Features Overview
00:02:08 MIDI Mode Demo
00:06:40 Mix Mode and Plugin Mode
00:13:14 Third-party Plugin Mapping
00:18:34 Final Thoughts"
Electronica w/ Prophet-10, Moog One, CS01, MOOD MK II | Catastrophic Derivative 2025-04-13 by atnr
video upload by atnr
"A piece created with the @SequentialLLC Prophet‑10, @MoogSynthesizers Moog One, and YAMAHA CS01—an IDM/electronica track where beats, bass, and synth layers intertwine.
A beat built in the DAW underpins:
Prophet‑10: synth‑bass line
Moog One: harmonic synth pad
CS01: lead part, routed through the @ChaseBlissAudio MOOD MK II for granular treatment and SPECULAR TEMPUS for reverb‑delay."
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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