Dynamic 2D waveform control, providing continuous access to all core wave shapes and extended variations. Controllable via front-panel controls and bipolar CV inputs with built-in attenuverters.
Unique alternating cycle-length patterns, creating clean yet harmonically rich distortion by varying individual cycle lengths while keeping the overall period stable.
Standard 1 V/oct pitch input, an adjustable fine-tuning section, and a true hard-sync input for precise, musically stable synchronization.
Optional MIDI input via a dedicated extension module (coming soon)."
"It took a couple of months, spending a few hours on weekends, but I got it done! And it's very cool. This demo is pretty rough, but highlights a bunch of the key features of the Step Brother and the "performability" it offers.
In this setup, the Steda SR-909 is sending midi clock to the Step Brother and the VP4 to keep them in sync. Step Brother is configured to run 2x8 step sequences on channels A and B. Channel A quantized CV output is sent to the 2600 mult and then routed to the CV inputs of oscillators 1 and 2. Channel B quantized CV output is sent to the CV input of oscillator 3.
Step Brother Gate Bus 1 is routed to the 2600 main gate input and triggering the 2600's ADSR envelope. SB Gate Bus 2 is triggering the envelope on the Step Brother and audio out of Osc 3 on the 2600 is routed to one of the VCAs on the Step Brother which is controlled by the Step Brother's envelope. That is then routed back to the 2600's mixer.
Audio out of the 2600 is routed to the VP4, and then routed to the ALA Bartender along with the audio of the SR-909. Output from the Bartender is sent to the iRig Pro and recorded on iPhone with the video.
"I'm very happy that Ed Brindley has made this FM sound module for the RC2014 and similar computers. This is the technology used in early PC soundcards and synthesisers like the DX1000. This is my first go at tracking music for this sound card. I used Furnace Tracker, exported to .vgm and ran Ed's music player to play it. You're hearing the capture from the new sound card.
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video upload by ohm_studi_ohm
"Demo of some patches I programmed on the Korg Polysix. This unit has the KiwiSix CPU board installed that adds many features (like MIDI, sequencing, 512 presets etc) without changing the sound of the synth.
The polysix is a true 6 voice VCO VCF VCA analog synth and it sounds great. By design however the enveloppe is slow and the sound a bit dark due to an added post FX VCF (LM13600). A simple mod allows to bypass this and let the synth shines. With this mod you get a very snappy and funky synth whose SSM2044 filters gets very well along the built-in chorus/phaser/ensemble FX. This unit has this mod done.
From funky keys, to lush string pads, the P6 has a very large scope despite its very limited features.
Only bad point of the P6 is that it has a fairly high noise level. Some improvement can be made like in this unit by adding more ground wires, applying copper foil on the bottom case and adding ferite around wires."
"INSTRUMENT IS FOR SALE AT REDUCED PRICE ON EBAY DURING JANUARY ONLY"
Pics of the inside below.
"Serviced and fully working classic 6 voices analog poly synth.- brand new KiwiTechnics Kiwisix CPU board that adds lot of features (MIDI IN & OUT, CC, sequencer, 512 presets etc)
- all electrolytic capacitors were replaced (the P6 has many of infamous Panasonic CE capacitors that leak after decades of use)
- post FX VCF mod: this simple mod gives the P6 faster enveloppe and fuller sound. A must do on all P6, check demo.- improvement of the ground design by adding more and thicker ground wires, copper tape on the bottom case and ferrite around the data wires
- full calibration
Unit is fully working and sounds great. As expected with these Polysix there still is some light background digital noise due to design, but nothing major, check demo to hear how it sounds.
Cosmetic is good with some scuffs here and there, especially on the case as it often is the case on P6. One switch cap ("hold") is not original."
"The new features for the Maestro Synthesizer. Part 1.
0:00 Intro
1:20 Upgrated Apreggiator
2:42 Poly Duo Mono Unison
3:46 Hot keys
4:04 Waveform selector
• Poly / Duo / Mono + Unison
• Advanced Arpeggiator: 4–8–12–16 steps, Up / Down / Ping-Pong / Random, note priority, external sync
• Gate Modes: Normal / Invert, first-note or every-note trigger
• Portamento (Glide)
• LFSR Noise with fixed or random modulation
• Waveform Selector: Saw / Square / Pulse + combinations (all through filter)
• MIDI: In / Out / Sync / Learn"
"The Roland MKS-80 isn't known as a typical analog pad machine like the JX-8P or the MKS-70, but still its VCOs are capable of creating some wonderful pads. I couldn't find many pad demos of the MKS-80 online, because most demos contain the powerful analog sounds that the Jupiter-series is so famous for. So I decided to record a few soft pads chords on the MKS-80 for the synth community. As its output is mono, I've added a bit of chorus and reverb from the SQ-5 to spice up the pads.
Played using the Moog Voyager as an expensive MIDI controller using its mod wheel to control the filter, but the fact that you hear polyphonic sounds and see a blinking green MIDI on the blurry MKS-80 in background is the ultimate evidence that you actually hear the MKS-80. ;-)
"Touchord is a MIDI controller especially designed with makers and musicians in mind. It makes music seem easy for those with minimal knowledge of music and for experienced musician it is a tool that can improve production and performance workflow. It's open source, with the intention of it being fully modifiable, hackable, upgradable beyond our intensions.
Support the project and buy one at: https://igg.me/at/touchord
Help the individual behind the project:
ko-fi.com/dovker
For many musicians, owning a CS-80 synthesizer is a dream that’s out of reach - both financially and in terms of required maintenance. While today’s VST replicas sound remarkably close, the true spirit of the CS-80 only comes alive when you have all controls at your fingertips. That’s why GLT Audio created the “Poor Man’s CS-80” — the PM-80, featuring 75 dedicated faders and a ribbon controller, offering an inspiring hands-on experience.
75 silk-smooth faders
30 cm ribbon controller
6 high quality waveform toggle switches
Slim table-top metal enclosure
Well connected
Power and MIDI-out over USB-C
MIDI-out over 3.5mm jack
Expression pedal input (converts to MIDI)
CV and Gate out, assigned to the ribbon controller
Magnetic overlays to play other virtual instruments
Use cases Map the PM-80 to your favorite CS-80 VST, such as Cherry Audio's GX-80, Softube's Model 77, Arturia's CS-80 V, Xils Lab's The Eighty, Morphoice's Unstable or Memorymoon ME80. Use the PM-80 for other VSTs, by adapting it's parameters using magnetic labels. Control a virtual audio mixer. (eg. 24 x level, 24 x pan, 27 faders for effects) Control hardware directly in a DAWless setup, using the MIDI DIN output (even allowing SysEx on customized firmware). Connect to your Eurorack: the ribbon controller outputs to CV and Gate. As a powerful generic MIDI controller, the PM-80 can even be used for applications like DMX light control and VJing. Product details 75 high quality silk-smooth 30mm faders by Alps Alpine (all without detents). 30 cm ribbon controller. 6 high quality waveform toggle switches and 3 slide switches. 1 special switch: while pressed you control 75 additional CCs. Slim table-top metal enclosure with screen printed metal faceplate and rubber feet. We will share the source code, allowing firmware customization by the user. Dimensions of the enclosure: 410mm x 205mm x 20mm. Designed and assembled in the The Netherlands.
Connections Power and MIDI over USB-C 3.5mm TRS MIDI-out (Type A) 3.5mm TRS CV & gate out (assigned to the ribbon controller) 3.5mm TRS expression pedal input (value sent out over MIDI)
Additional items Magnetic overlay labels for: a famous 1977 poly synth a famous ladder filter mono synth blank (for handwriting) more to follow… 3.5mm TRS to MIDI DIN converter. 3.5mm to 6.3mm TRS converter for expression pedal input.
2025 Partners:
Bell Tone Synth Works, CMS, CatSynth TV, EMEAP/MMT, Eric Crawley/Dan Gilbert, Interage MediaWorks, Knobcon, Korg, Anthony Marinelli Music, Antonus, Mashina Bristronica, NAMM Museum of Making Music, Vito Nandi, New England Synth Fest, Projekt Records, Steve Roach, Round & Wound, the SynthCave, SynthCube, Synthtopia, Synthetic Dreamscapes, The Record Co. (TRC), Sharon Wasko Designs
Thank you to all of our donors, volunteers, interns, friends and partners including (but not limited to) Alex Ball, Antonus, David Baron, Lisa Bella Donna, Chris Cardone, Jon Carin, Alison Cassidy, Nick Carlisle, Phil & Linda Cirocco, Mike Cushing, Tom Cusimano, Eric Crawley, Stephen DeJesus, Rich Formidoni, John Foxx, Dan Gilbert, Patrick Gleason, Herbie Hancock, Martin Gore, Rupert Greenall, Ryan Hawkins, Mary Lock, Mark Marshall, Machina Bristronica, David Mash, Steve McQuarry, Bill T. Miller, LaMar Mitchell, Chris Meyer, NE Synth Festival, Nicola Joss, Ruperto Ifil, Brian Kehew, Anthony Marinelli, Tom Piggot,TRC (The Record Co). EMEAPP/MMT, Mary Lock, David Mash, Matrix Synth, Michelle Moog-Koussa, Tony Norton, Jim Michmerhuizen, Mike Metlay, C. Carl Peters, Rob Puricelli, ProSynth Network, Drew Raison, Steve Roach, Sam Rosenthal, Drew Schlesinger, Don Slepian, Steve Smith, SynthTopia, the NAMM Museum, the MiDI Association, Real World Studios, Gerson Rosenbloom, Collin Russell, James Thirlwell, Pete Townshend, the Townshend Studio, and Andrew Ward"
"I have updated my Waldorf Music M bidirectional TouchOSC editor for M firmware v1.11, please find here some screenshots highlighting the changes:
SPECIFIC FEATURES (FW v1.11): - 2 Editor Pages per M Part (total of 8 Pages for the 4 M Parts) - 1 Editor Page for M Multi - 1 Editor Page for M Global - All Single (Program) (258 x4 = 1032, for each of the 4 Parts) parameters implemented in the editor. Program parameters are bidirectional using SYSEX - All Multi parameters (130) parameters implemented in the editor. Multi parameters are bidirectional using SYSEX - Most Global parameters (65) have been implemented. Global parameters are unidirectional using SYSEX - Automatically imports M current Single / Multi bank / program numbers (3 parameters) when the editor is started using SYSEX - MIDI Channel selection slider - Bank (change) + Program (change) selection slider + buttons - Buffer Request, Buffer Init, Buffer Write and Program Write buttons using SYSEX - Multi (Arrangement) change buttons using SYSEX - Multi (Arrangement) Buffer Request, Multi (Arrangement) Write buttons using SYSEX - Single (Program) Part 1, 2, 3 and 4 Request (in Multi editing) using SYSEX - Part 1, 2, 3 and 4 to Single (Program) Write buttons (in Multi editing) using SYSEX - Automatically switches M to Single or Multi for operations described above
FEATURE REQUESTS / BUG FIXES: - Go to the video Description on Vimeo"
"Official tutorial for the SonicProjects OP-X PRO-3 virtual analog VST AU plugin featuring its new Programmer's Edition.
Table of contents:
00:00:00 Intro
00:00:14 Features Overview
00:03:56 Changes in the Programmer's Edition
00:07:26 Switch Interface Size and Color
00:08:20 Tooltips
00:09:52 Patch Manager / Comparison to OP-X PRO-II
01:34:08 Voices Engine / Voice Boards Tuning
02:39:32 Pan Controls / Panning Modulation
02:49:47 Filters Section
03:23:55 Oscillators Section
03:37:29 LFO Section / Modulation Matrix
04:14:46 Pitchbend Modwheel / Master Section
04:30:01 Envelopes Section
04:36:42 Effects Section
04:48:22 MIDI Learn / Remote Program Change
04:58:43 Arpeggiator / MIDI Processor
To navigate within the Tutorial either click these time markers or use the YouTube generated chapter sections in the timeline of the video. When you click the arrow on the right side of the chapter name below the timeline the chapters will open in the right pane for direct selection.
"This beautiful 80’s vintage synth, the Korg Polysix, had been previously upgraded with the Kiwisix Mod and a Kiwisix Power Supply. So basically, classic Polysix sounds with a modern touch! Will be packaged very securely for shipment.
Also comes with a very rare vintage Korg hard case that was designed specifically for the Polysix.
— Kiwisix Mod & PSU Upgrade —
Eliminates voltage inconsistencies, noise, and the infamous leaked battery issues that plague the classic Polysix.
Adds MIDI in/out, master clock control, key transpose, built-in sequencer, enhanced arpeggiator, etc.
Comes preinstalled with Korg’s original 64 stock presets. The mod now allows you to store a total of 512 total presets."
"It is a synth-pop track where RX17 beats are layered with melodic phrases from the Game Boy and phaser-processed electric piano sounds from the OP-1 field.
The Game Boy plays sequences created in LSDj, routed through the @KORG_INC NTS-3 looper.
On the OP-1 field, an electric piano sound is played via the sampler. The sequence is triggered by MIDI sent from Ableton.
The RX17 is also sequenced via MIDI from Ableton, with a light touch of reverb applied using the @strymon blueSky."
"Nexus is here. A generative chord-based sequencer for monome Norns that I've been teasing in recent videos.
In this demo, Nexus is driving a Dreadbox Nymphes via MIDI. The signal chain: Nymphes → Oto Bim → Oto Boum → Chase Bliss Onward → Chase Bliss CXM 1978.
Nexus lets you select from a 15-chord diatonic palette while a probabilistic engine triggers notes from within each chord. Two rows on the Grid let you play along in the current scale. There's also bass and sub-bass sequencers that fire root notes on chord changes.
The script outputs MIDI and Crow CV/Gate - so it'll work with pretty much any setup.
Disclaimer: This is an unofficial add-on to the M user manual, describing some of extra features added from firmware 1.05 up to firmware 1.11. This add-on also covers some complex aspects of the Multi Mode, which remains somewhat unusual.
Author: Vladi Salnikov aka VladiS.
Algorithms of FW version 1.11:
Varysaw: A VA oscillator ranging from SAW through PULSE to TRI.
Wave (red encoder): Mixes from 0 to 31 from SAW to PULSE; 32 is pure PULSE, and 33 to 63 mixesfrom PULSE to TRI.
Meta parameter: Pulse width for PULSE, adjustable from 5% to 95%.
CSAW: A famous Yamaha CS-80 saw oscillator with mutation towards a parabolic oscillator.
Wave : Controls the amplitude of the “step” component of the saw wave.
Meta parameter: Mixes between this saw wave and the parabolic saw wave.
Waveshpr: A SAW to TRI oscillator fed into a mild waveshaper.
Wave : 0 is pure SAW, 1-62 mixes between SAW and TRI, and 63 is pure TRI.
Meta parameter: Depth of the waveshaper.
TriplSaw: A stack of three SAW oscillators; two are detuned slightly higher and lower than the third.
Wave : Controls the amplitude of the “central” SAW oscillator relative to the two “side” SAWs.
Meta parameter: Detuning factor, from 0 to maximum detune.
S/T Fold: A SIN wave folding oscillator that folds the chosen crossmixed wave between SIN and TRI waves.
Wave : 0 is pure SIN, 1-62 mixes between SIN and TRI, and 63 is pure TRI.
Meta parameter: Folding depth.
FM 2 OP: Classic simple two-operator FM synthesis. OP1 (modulator) generates a sine wave that modulates the phase of OP2 (carrier). Both operators generate sinewaves; the algorithm's output is the carrier signal.
Wave: Maps values from 0 to 63 to harmonics ratios of 1 to 8 in stepped increments.
Meta parameter: Amount of phase modulation applied to the carrier.
"1979 Oberheim OB-X 6-voice analog polyphonic synthesizer in excellent cosmetic and functional condition. This unit has been fully professionally restored and is stable, reliable, and ready for daily studio use.
This is not a project or a fixer — it has been properly serviced and maintained.
Restoration
Recently (late 2024) fully restored by a Retro Pro Audio in Belmon CA. Complete restoration documentation included.
Work includes:
Power supply unit (PSU): Replaced voltage regulators (including failed LM337), bridge rectifiers, PSU filter caps. Replaced battery and added removeable battery holder. Calibrated Full calibration of all 6 voice cards Replacement of aging components where required Keybed complete service and test Control boards were removed and cleaned along with the front panel. All button contacts were cleaned and pots lubricated. Installed a dedicated 5.6V power supply for the CV S&H circuit Full functional testing and burn-in All voices tune correctly and respond evenly across the keyboard. Factory patches restored Much more was done. Full details with photos available upon request. Comes with (unrestored) Oberheim factory volume pedal.
Condition
Very clean front panel with clear lettering Excellent wood end cheeks Clean rear panel and jacks Only light wear. This instrument does not look 45 years old. Overall, a very well-preserved OB-X.
"How close can the Nina get to the Vermona Perfourmer? Distributing MIDI notes evenly across three layers on the Nina, each with slight variations in filter and envelope settings. The track, originally made with the Perfourmer (ID: Samuel Yang - Skyward Bound), is now played on the Nina, and I’m amazed by how closely it replicates the original, with its round-robin arps.
Arps coming from Nina, everything else was pre-recorded / taken from the original track."
