stuartl/atinysynth
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adckbd: Add first stab at ADC-based keyboard. 
This works by relying on a resistor ladder that is part-shorted-out by a
button to Vcc.  The ADC detects the button pressed from the voltage seen
on the ADC.

There's some work to be done on this yet.
2017-05-01 17:35:19 +10:00
ports adckbd: Add first stab at ADC-based keyboard. 2017-05-01 17:35:19 +10:00
.gitignore gensine: Add in sine wave generator. 2017-04-25 17:43:51 +10:00
adsr.c adsr: Add functions for configuring the ADSR. 2017-04-09 08:17:03 +10:00
adsr.h adsr: Add debugging 2017-04-09 10:06:38 +10:00
debug.h debug.h: Add debug helper 2017-04-08 20:26:45 +10:00
gensine.py gensine: Add in sine wave generator. 2017-04-25 17:43:51 +10:00
LICENSE ADSR-based synthesizer for microcontrollers 2017-04-08 18:57:37 +10:00
Makefile gensine: Add in sine wave generator. 2017-04-25 17:43:51 +10:00
README.md ADSR-based synthesizer for microcontrollers 2017-04-08 18:57:37 +10:00
synth.h synth: Make enable/mute bits volatile. 2017-04-09 10:17:09 +10:00
voice.h voice: Add test for voice channel done. 2017-04-09 10:07:10 +10:00
waveform.c waveform: Fix logic errors in triangle synthesis 2017-04-09 07:26:16 +10:00
waveform.h waveform: Increase step to 16-bits. 2017-04-09 07:19:04 +10:00

README.md

ADSR-based Polyphonic Synthesizer

This project is intended to be a polyphonic synthesizer for use in embedded microcontrollers. It features multi-voice synthesis for multiple channels.

The synthesis is inspired from the highly regarded MOS Technologies 6581 "SID" chip, which supported up to 3 voices each producing either a square wave, triangle wave or sawtooth wave output and hardware attack/decay/sustain/release envelope generation.

This tries to achieve the same thing in software.

Code is presently a work-in-progress.