MATRIXSYNTH: DevsoundSE


Showing posts with label DevsoundSE. Show all posts
Showing posts with label DevsoundSE. Show all posts

Tuesday, July 24, 2012

devsound SJS-ONE Synthesizer


"SJS-ONE is a software defined 8-bit mono synthesizer with a dual (series) MAX261, switch-cap filter, which we are, as far as we know, the only ones to use at this point in a DIY-synthesizer.

The synthesizer has some interesting history that has certainly colored its development and ultimately it’s sound. The initial version was developed as an instructional workshop for a synth-event called SyltJam in 2011. The workshop idea was to show people how quickly you can design the basic hardware and software required to produce a platform for versatile audio and music generation.

As it turned out, people liked it’s sound so much that we decided to refine the design – which more or less involved adding peripheral components to increase configurability and improve on stability and ESD, ground-mismatch and noise sensitivity while keeping the actual design minimal and simplistic.

It’s beginnings are as humble as it’s production – less than 50 of these have been made available and all parts are hand assembled and hand soldered, while the manual is hand drawn and cases hand painted.

Perhaps the most unique aspect of this synth is the choice of digital platform – the Arduino. We did not want to build something static and opted to keep the Arduino instead of adding an on-board microcontroller. Because this will make it so much easier to modify the functionality of the synth firmware provided by us, or to write your own software with a completely unique sound using the vast community support that is available for the Arduino platform.

All aspects of the synth can be fully controlled by designing your own custom firmware and we sincerely hope that people will share their firmware in the spirit of the open source and hardware that inspired us to drive this project from idea to final product.

Host board: Arduino Uno
ATmega328 16MHz
2KB RAM
32KB Flash ROM
Power supply: USB-B 5V DC
2.1mm center-positive barrel 6-12V DC
Output circuitry: 8-bit R-2R ladder DAC
Filter: MAX261
Analog output: ±2.5V signal level (external amplifier required)
Software defined parameters: Waveform
Filter modes
Filter resonance
Filter cutoff
Filter connection (LP, BP, HP)
Filter bypass

You can purchase the SJS-ONE from the DevSound Shop."



http://devsound.se/2012/sjs-one

Sunday, December 04, 2011

Malmö Syltjam 2011 - Pollux Mimi-A & Syltjamsynth


YouTube Uploaded by DevsoundSE on Dec 4, 2011

"Demonstration of the Pollux MiMi-a 6-voice polyphonic analog synthesizer.

Built by Ricard Wanderlöf in 1987.

This amazing synth features 6 voices with two oscillators per voice plus sub-oscillator, controlled digitally by a Z80 processor and lots of home-built logic. Each oscillator has individual envelopes. It has a filter that is based on a design found in the Moog Rogue, it has a mod that allows CV-control of the resonance (the synth is even signed by Bob Moog). It's built entirely on copperless veroboard!

It sounds just amazing! This recording doesn't do it justice!"

Malmö Syltjam 2011 - Syltjamsynth

YouTube Uploaded by DevsoundSE on Dec 4, 2011

"Some videos of the synthesizer that was built during the 3-day synth-jam in Malmö 2011.
It consists of an Arduino with midi-shield, and a switch capacitor filter.

At first it had a nice 4-oscillator super-saw playing monophonically.
Later, 4 note polyphony was added, for a total of 16 oscillators!
At the end of Sunday it also had portamento, volume envelope, oscillator spread and pitchbend! All controlled via MIDI-CC.

Full schematics and source code soon avalible on devsound.se"
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