Auduino

 

Auduino Release status: experimental [box doku]
Description	Simple Arduino based synthesizer
Author(s)	tiefpunkt

The Auduino is a small synthesizer, based on the Arduino. The only external components required are 5 potentiometers, and something to output the sound, such as a small speaker, or a headphone jack.

Hacks

Modify the scale

By default, the Auduino uses a pentatonic scale. That can be changed in the source. An external switch to change the scale during runtime would be awesome.

Below are the options, only one is executed during runtime.

 // Smooth frequency mapping
 //syncPhaseInc = mapPhaseInc(analogRead(SYNC_CONTROL)) / 4;

 // Stepped mapping to MIDI notes: C, Db, D, Eb, E, F...
 //syncPhaseInc = mapMidi(analogRead(SYNC_CONTROL));

 // Stepped pentatonic mapping: D, E, G, A, B
 syncPhaseInc = mapPentatonic(analogRead(SYNC_CONTROL));

Adding some if-clauses, dependend on digitial inputs might be a decent solution.

Delay

Here's an example on using a ring buffer as a delay: http://rcarduino.blogspot.de/2012/11/auduino-with-delay.html

Maybe that could be added as an option as well.

CV Inputs

Pots are ok, but with some automation, we could play songs. So the idea is to add CV inputs to all the 5 pots (0-5V), which allow to connect a sequencer. Also, a gate input of some sorts would be cool as well.

Links

• Audoino Homepage
• Audoino Step Synthesizer (includes a good explaination of what's actually happening inside the synth)