Tuesday, April 15, 2025
PlantsSystem-TalkBack OpenSourceModularSynthesizer "SurgeXT"
video upload by plantssystem
"SurgeXT offers a wide range of synthesis techniques in a single engine, including traditional subtractive synthesis, FM, wavetable, linear phase distortion, and waveshaping.
Each voice has three oscillators, each with up to 12 oscillator models. Independent tuning and unison capabilities allow for extremely versatile sound creation.
The filter section has multiple modes, including digital, analog modeling, combo, and feedback, and offers over 12 filter algorithms to choose from. In addition, 24 modulation sources and up to 171 modulation targets allow for highly dynamic control over sonic transformations.
Over 30 built-in effects are available, with flexible parallel/series connections and multiple slot routing. VST3/AU/LV2 compatibility and native operation on Linux, Windows, and macOS.
SurgeXT is more than just a free synth; it has specifications that meet the needs of professional production environments."
Introducing RollBud - DJ Style Rolls and Trance Gate Effects - AUv3 FX for iOS
RollBud - Trance Gate & Roll FX video upload by Cem Olcay
"I’ve released my new app RollBud for DJ style rolls and trance gate effects.
- The XY-pad is customizable for both X-axis (beat lengths) and Y-axis (envelope or mix controls), and it’s also MIDI controllable.
- You can record your movements and play them back. They are saved in iCloud and also the recordings can be triggered with MIDI as well.
- The roll mode has a reversed roll mode playing the loops backwards, and the trance gate mode has a inverted envelope mode for fun.
- Envelope’s rise and fall ratio, curve (logarithmic to linear to exponential) and amount, as well as the dry/wet mix can be set on the UI.
More technical details on the effects:
- Roll mode: records the input signal and starts to loop the last beat from the recorded buffer. The loop length is selected on the xy-pad. Applies the envelope on the each loop. The live signal continues to run underneath and with the dry/wet mix you can balance the mix as you’d like.
- Trance gate: applies the envelope to the live input signal. The envelope duration is selected on the xy-pad. You can use the dry/wet mix to balance the intensity of the effect."
https://keybudapp.com/rollbud
https://apps.apple.com/usus/app/rollbud-trance-gate-roll-fx/id6743325110
SHADES - NEW Sound Bank for Quantum/Iridium🔥🔥🔥
video upload by SMV Producer
"This is my last sound bank for these incredible synths. Some beautiful evolving pads, sequences and FM sounds, are part of the soundset. Everything was straightly recorded without any additional processing.
Enjoy....
Sound banks available for purchase at:
https://gumroad.com/smvproducer
Other links:
Bandcamp : https://sergiomassimilianovarvazzo.ba...
Instagram: / smv_producer
Smartlink: https://ffm.bio/smv_producer
TIMELINE
00:00 One Osc Dream Pad
01:16 OB 18 Dreaming Steps
02:30 Lost Somewhere
04:46 18 Steps
05:56 Experiment
07:46 WT Sequence
08:34 Very Slow Pad
10:24 Sequence Lover
11:26 Airy Pad
12:14 FM Bass
13:14 It is a butter
13:55 15 Steps with FM
14:37 Schizoid - Watch till the end
17:01 Wave Goodness
18:46 FM Goodness
19:36 8 Steps random Waves
20:16 Straight FM
21:04 Techno
22:41 FM Experience"
Dave Smith Evolver - Modern Sampler Series 110 Samples & Sequences
video upload by LFOstore
"Nick Klimenko sampled one of the most intriguing Dave Smith synthesizers - Evolver!
BUY: https://lfo.sellfy.store/p/dave-smith...
Now you have an access to 110 exclusive sequences - 100 PBM, root C
directly from our soundset 'Are You Sequenced?' for Evolver.
Hi quality 24/44 samples (570 mb) in root 'C' in different octaves to transpose to any note you want.
Fields of using:
*You can use this sounds directly in your tracks
*Put in Sampler – Kontakt, Ableton, Cubase
Attention: due Evolver architecture - BPM clock is not stable, its floating, so if you want to use samples in the rhythmic tracks - take first 4 BARS from every sample - they are perfectly synced.
Note: this pack contains only SAMPLES, not PRESETS for mentioned synthesizers!
Touch the Treassure with our 'Modern Sampler' Series!
Enjoy!"
FESMA PK-70 - Vintage Italian Synth (1985) HD
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."
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."
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."
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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