The Korg MS-20 Retro Expansion is my heavily modded version of the Mini version, although the mods would also work on the original model. If you're interested in adding any of these mods to your own MS-20, I've described all details of the circuit changes and added more photos of my synth on my web site:  www.yewtreemagic.co.uk/soundworlds3.php

The Retro Expansion includes the following additional features:

1. MULTI-OUTPUTS: To supplement the existing choice of one of four OSC1 waveforms I added separate TRI, SAW and PULSE output sockets, all available simultaneously, plus a separate output for OSC2.

2. PWM: Next up was an additional input for OSC1 variable pulse width modulation, using the existing pulse width knob to control PWM level. 

3. SYNC & FM: A Sync toggle switch was added to OSC2, to lock it with OSC1 for those screaming lead sync FX.

4. An FM input was added to OSC2 with its own rotary level control, so it could be modulated at audio rates by OSC1 among other options.

5. VCO MIXER: I also expanded the existing mixer section, adding two extra input sockets, each with its own level control knob. These can be used to mix together several oscillator waveforms, or to mix in other patchbay or external audio signals.

6. I also added a more traditional transformer/schottky diode ring modulator circuit to achieve far more mellow ring mod options than the integral (XOR) option.

7. Final casework mods included a new top-mounting panel for all the new controls, a 1/4-inch jack output, and cherry hardwood side panels.

I'm well pleased with the results - enjoy!

Martin Walker

Sync, FM & Ring Mod

February 2025 "Rusty iron railings" released!!!
https://voodoozoo.jimdofree.com/music/
This is a fairy tale about a desert town about three working mice. Sounds mixed with sand grains and noise tell a story about the near future.
https://voodoozoo.jimdofree.com/
==========================================
Our passions were burned by the heat of the sun and blown away by the cold wind. What remains is "habit". Ah, I still want to get fresh images from what I touch and listen to, and whenever I touch an instrument, I want to experience the same joy I felt the first time I played it well.
I always want to play exciting melodies.

Mark started listening to electronic music as a pasttime during his studies way back in the 1980-90's. Eventually he wrote some of the artists and bought their music. After a while he became so interested, that he started creating music of his own.
To promote electronic music, he joined a local radiostation (Radio Cosmos) and actively played / mixed and presented electronic and cosmic music along with mainstream pop, dance and music from movies.
Now Mark plays some instruments and is himself involved in the rekindle of electronic and spacey music in Belgium. Enjoy what you find here, and show the musicians how much you like their music.

Everything's better with a little acid, straight forward electronic grooves, deep sounds and trippy atmospheres.

“Firdous E Bareen” es un grupo de música que no gravita hacia un estilo determinado. Su objetivo es reinventarse en cada producción, abarcando todas las tematicas y generos musicales.
El conjunto fue fundado por Martin Rodas a fines de publicar sus trabajos como interprete y compositor solista. Parte de la premisa de explorar la diversidad como un agregado artístico; la linea rectora es que cada producción sea un universo nuevo.
Su primer proyecto discográfico, “Firdous E Bareen”, es un álbum de composiciones instrumentales que presenta un carácter escénico, pensado para ser aplicado como complemento de material cinematográfico, videojuegos, obras de danza o teatro. Fue grabado, mezclado y masterizado entre julio del 2015 y septiembre del 2016 por Martin y lleva como título el nombre de la banda.  Ya se encuentra disponible para escuchar en streaming y descarga directa.
En el entretiempo, en 2015, Firdous tambien se encontró realizando música e instalación sonora para la obra de danza “Con un mismo corazón” que hizo estreno con presentaciones el 12 y 13 de diciembre del 2015 en el CCM Haroldo Conti. Una serie de trabajos que fueron realizados en etapas tempranas de la producción se encuentra en este canal para ser reproducido con el nombre de "Con un mismo corazon (demos)"
Actualmente Martin se encuentra trabajando en el proximo material de Firdous E Bareen, así como tambien en musica original, diseño sonoro y asistencia tecnica en proyectos de indole audiovisual.

Looking for studio Projects/Producers & Manager, ideally being part of the creative process within Cornwall, UK.

My main influences are Film, Dance, Electronic, Gaming and Experimental but I love most genres so would consider all opportunities.

Website: www.veganvocalist.com

Good Mourning - Vegan Vocalist. Buy @CdBaby

https://store.cdbaby.com/cd/veganvocalist2

Influences:

Bob Vylan, Bloodywood, Dead Prez, Wu Tang Clan, Michael McDonald, Sa-Roc, Martha Wash, Carl Cox, Gilly Dangerous, Brett Wilde, Gary Numan, Peter Gabriel, Docile Doberman, Rage Against the Machine, Foo Fighters, Michael Jackson , Saul Williams, Ennio Morricone, Pink Floyd, Peter Skellern, Jerry Goldsmith, Genesis, Siouxsie and the Banshees, Radiohead, Hans Zimmer, Steely Dan, Stereo Lab,  Elliot Smith, Rufus Wainright, Led Zepplin, Akala, Ella Fitz Gerald, Olivia Newton John, Kate Bush, Freddy Fresh, John Barry,  Klaus Doldinger, James Honer, John Willams, Stevie Nicks,  Joni Mitchell, Portishead, Goldfrapp, Orbital , Professor Green , Nick Drake, John Martyn, Tim Buckly,  Elkie Brooks, Christopher Cross, Amy Winehouse, Bjork, The Carpenters, Whitney Houston, Veela, Sam Brown, Anita Baker, Mariah Carey, Clare Torry, Beth Hart, Frank Zappa, Grace Jones, Adele, Jessie J, Wintergaten ohhhh and Barry White, how could I forget you!

Martin Walker is well known for his music and sound effects design on over a hundred game soundtracks, and for his columns and features on sound design in magazines such as Sound On Sound and Audio Technology.

are you on the wild side?

UPCOMING RELEASES:


…and many more!

________________________________________________________________________

RELEASES:

- Sequences UDE002 V/A 12” vinyl/ digital (Undancell Records, 2024) 
- Compact Demons EP 12” vinyl/ digital (Dischi Nottetempo, 2024)
- Secret Stairs Vol.2 V/A limited edition cassette/digital (Florklang Records, 2024)
- Stay Fast 2 V/A digital (Lambratech Records, 2024)
- Poimandres EP 7” vinyl limited edition (Fides Records, 2023) 
- 030303 V - Various Artists LP double 12” vinyl (030303 Records, 2023)
- V/A Acid Explorations - 12" vinyl (Eudemonia Records, 2023)
- V/A "Cheers From Italy Dual Act” cassette/digital (Proper Line, 2023)
- "Mixture Of Phases EP" tape cassette/digital (Florklang Records, Japan 2022) 
- Artificial Intelligence VOL. I ~ VV.AA. 2x 12" double vinyl (Artificial Intelligence, 2022)
- QUALIA "Qualia EP" (project I took part of) 12" vinyl/digital (U-Trax Records, 2022)
- USR021 Various III - vinyl 12" (Undersound Recordings, 2022)
- Sugary Hills EP 10" vinyl (NOUN Records / Undersound Recordings, 2022)
- Fukuinn02 V/A // 12" vinyl/digital (Fukuinn Records, Japan 2021)
- Discarded Candies EP digital (EVES Music, 2021)  
- W49B vvaa - 12" vinyl (Nebulae Records, 2021)
- V/A "Cabotronium" digital format (EVES Music, 2021)
- V/A "The Auditory Perception of Idiosyncrasy Vol​.​II" - digital format (Sitdownandance, 2021)
- V/A mental concept 222 - 12'' vinyl limited edition series (mindcolormusic, 2021) under the new alias "Raviform Pio"
- VVV016 V/A - "Sovrasensibile Project" digital/pack (Antistandard Recs, 2020)
- Solitario EP - 12" vinyl/digital (030303 Records, 2020)
- WVA001 / VV​​.​​AA. "AntiWorld A" - digital format (Antistandard Recs, 2020)
- V/A "CC006" digital format (Cuco Records, 2020)
- V/A "Australian Bushfire Compilation (Part 2) digital format (Touched Music, 2020)
- V/A aux44100 10 years mindcolormusic compilation 3x12'' vinyl (mindcolormusic, 2020)
- [DSP002] vinyl 12" vvaa - Outer Solar System (Distorted Sensory Perception, 2020)
- [NBL006] vinyl 12" vvaa - N49 EP (Nebulae Records, 2020)
- [MOL006] cassette/digital vvaa - One Million Black Lines (M.o.l. Records, 2019)
- V/A "Cheers From Italy 250mg" cassette/digital (Proper Line Records, 2019)
- Caramel Chameleon & David Harleydson  "disk.data EP" (Moisture Records, 2019)
- Smash Gate (EVES Music, 2019)
- V/A "Fungi Compilation" digital (Nenormalizm Records, 2018)
- TASKEM (Moisture Records, 2018)
- Adolescend (Moisture Records, 2018)

Sync, FM & Ring Mod

Yew Tree Magic