Hagiwo's 9$ DIY Chord VCO v2

video upload by MrCaliforniaD

[ $9 ] DIY eurorack modular synth CHORD VCO v2 with Seeed XIAO RP2040 | Raspberry pie pico

video upload by HAGIWO

"My 61th original eurorack modular synth DIY projects.
RP2040 based 5 polyphonic CHORD VCO , easy to play chord progression.
Built-in quantizer and autoharmonics.

working documents ( schematics & source code )
https://note.com/solder_state/n/n64b9..."

Nintendo NES Music - Contra - Played on a 1975 Roland System 100

video upload by MrCaliforniaD

"All sounds were made on the Roland System 100."

Commodore Music on a Super Nintendo & Nintendo NES - Jet Power Jack

video upload by MrCaliforniaD

"Me: Mom, can we have synthesizers at home?
Mom: We have synthesizers at home.
Synthesizers at home:
🤓"

The Nintendo NES MIDI Synthesizer

video upload by MrCaliforniaD

"I built this custom Nintendo NES MIDI synthesizer using a real Nintendo (Model NES-001) and a Famimimidi NES cartridge.

The Famimimidi NES cartridge is an incredibly well developped product that lets you control a Nintendo sound chip via MIDI IN. It's rare that such a product is released to the public in such a stable and complete state.

The cartridge is available for purchase (https://catskullelectronics.com/produ..., but it seems to be out of stock at the moment.

The challenge for this project was to fit everything in a 1U rackmount enclosure.

This project is a one-off, and I don't intend to build more of them. Not for sale. Sorry!"

Also see The Super Nintendo Synthesizer with MIDI

The Super Nintendo Synthesizer with MIDI

video upload by MrCaliforniaD

"I built this custom Super Nintendo MIDI synthesizer using a real Super Nintendo (SNS-001) and a Super Midi Pak cartridge.

The Super Midi Pak cartridge is an incredibly well developped product that lets you control a Super Nintendo sound card via a MIDI I/O cartridge. It's rare that such a product is released to the public in such a stable and complete state.

The cartridge is available for purchase (www.supermidipak.com/), but there's a long waiting list for it.

The challenge for this project was to fit everything in a 1U rackmount enclosure. One of the things that had to be modified was the cartridge port angle, so that it sits parallel to the board instead of perpendicular.

The pitch adjustement knob uses a LTC1799 Precision Oscillator instead of the original crystal assigned to the audio chips. Credit for this mod goes to Sam from Look Mum No Computer. Go check out his channel if you haven't already.

This project is a one-off, and I don't intend to build more of them. Sorry!"

"YAY OH" Demo Song - E-MU Emax 1

video upload by MrCaliforniaD

"The Emax 1 sequencer in all its clumsiness.

I could not find any information about this demo song on the web."

Analog Filter Comparison - Korg 35 / ARP 4072 / Moog 4-Pole Ladder

video by MrCaliforniaD

Music: Lead track from Pitfall II
Oscillator: 70% Pulse of a Korg MS-20

Korg 35 filter : Korg MS-20 (early revision)
A.R.P. 4072 filter : A.R.P. Explorer I
Moog 4-Pole Ladder Filter : Moog Minimoog Model D

"It is virtually impossible to do a fully comprehensive video of all the aspects of a filter. This video is not trying to achieve this goal, but to document just some of these variations.

All filters do not lose or add gain over frequencies the same way, and even though I tried to normalize the gain as closely as I could to one another, there are always differences, especially at the early stage of filter oscillation. The type of speakers you're listening this video with will also make a huge difference in the perceived tone."

I'll Be There (Jackson 5) - Arp Explorer I Analog Synthesizer From 1974

video by MrCaliforniaD

"I made this video back in 2013. I then tried to upload it on YouTube, but it got rejected because of copyrights infringements.

Now that they can monetize it all they want, maybe I can share it with the world.

This song was originally recorded in 1970. This is what it could have sounded like if all the tracks were recorded on a Arp Explorer I Monophonic Analog Synthesizer from 1974.

Polyphony was achieved by adding monophonic tracks on top of each other but it was kept pretty minimalistic."

Donkey Kong Country 2 - Boss Theme - Played on a E-MU Emax

video by MrCaliforniaD

"To be listened at a reasonable level on a stereo setup."

Synthesizer CV to X-Y Recorder Visual Art

video by MrCaliforniaD

"In this video, a 2 channel MIDI to CV converter is controlling a X-Y Recorder.

This technique is pretty straight forward. The X-Y Recorder is listening to voltages signals on its two X-Y axis. The voltages are taken straight out of the MIDI to CV converter's two channels.

I used a 2 track song. One melody moves the X axis on the plotter and the other melody moves the Y axis. The pen is drawing the resulting mix of theses to axis interfering with each other.

Special thanks to RAMCUR for his help and support in that project!"

Fairlight Intro Cover on the Commodore Music Maker Deluxe

video by MrCaliforniaD



"In this video, I've re-recorded the famous hack intro from Fairlight.

I tried to edit the Commodore 64 patches as close as I could to the original.

I used a C64c with a 6581 R4-AR."

See this post for MrCaliforniaD's DIY C64 Keyboard

King's Quest VI - The Isle Of Wonder (PC) - Played on a Korg DW-6000

video by MrCaliforniaD

"Aliasing digital wavefoms festival."

E-MU EMAX - RAP DEMO - RAD RAPPERS

MrCaliforniaD

"This is the E-MU EMAX RAD RAPPERS DEMO.

This obscure demo might have been produced at some point by the E-MU team when the SE upgrade was released, but there's no mention of it on the Internet.

Therefore, I am sharing it with the world.

Special thanks to Jay Boy for helping me find my Emax and to Olivier Van Tassel for selling it to me!"

Korg MS-20 Keyboard Voltage Out to a Plotter

MrCaliforniaD

"Note that I ran out of paper at the end of the song."

DIY ARP 4072 Lowpass Filter (ARP 2600)

Preview of latest circuit: The ARP 4072 Lowpass Filter (ARP 2600) MrCaliforniaD

"Version 1.0 is working like a charm.

Once in a proper enclosure, I'll try to record something more substantial.

Thanks to Eddy Bergman for his unconditional support.

You can visit his website to get the schematics. Also check out his other awesome projects while you're at it:
https://www.eddybergman.com/2020/03/s...

I don't sell theses modules. Sorry!"

Some details via Eddy Bergman's website (note the schematic is from YuSynth):

Wednesday, 4 March 2020

Synthesizer Build part-21: ARP2600 LOWPASS FILTER (4072).

The best sounding filter of any I built so far! With verified stripboard layout.

A word of warning right at the start; this is an advanced project, not for beginners. You need to know your electronics and you also need to have a good multi channel oscilloscope.

CLICK FOR MORE »

DOOM - Map 01 - Played on a Yamaha Reface CS

MrCaliforniaD

"All the sounds, except for the drums were generated by a a Yamaha Reface CS.


No effects has been added."

The Legend of Zelda - Main theme - Played on a Boss Bass Synthesizer SYB-3

MrCaliforniaD

"Here's a very minimalist track."

Ennio Morricone - The Ecstasy of Gold - Played on a real Moog Minimoog

Published on May 12, 2020 MrCaliforniaD

"Soundtrack from the movie 'The Good, the Bad and the Ugly'.
Played on RAMCUR's custom 'Minimoog in a suitcase'."

China Bing Bing Bing - Exploring Sounds on he Roland VP-9000 Time Streching Sampler

Published on Apr 25, 2020 MrCaliforniaD

0:00 Roland VP-9000 sampler alone.
4:05 Roland VP-9000 sampler + Akai S612 sampler.

Pitfall II - Main Theme (Atari 2600) - Played on a Korg Micro-Preset

Published on Apr 18, 2020 MrCaliforniaD

"All the sounds you hear in this clip were recorded on a Korg Micro-Preset (M-500).

Preset used:
- Lead: Wood - Flute / Bass: Synthe 2 - 8' : 0:00
- Lead: Voice - Alto / Bass: Synthe 1 - 16' : 1:06
- Lead: Synthe 2 - 8' / Bass: Synthe 2 - 8' & Synthe 1 - 16' : 2:13
- All together : 3:20

Only a slight reverb was added to the mix."