Tone sequencer with envelope and filter

This is the source code landing page for the littleBits tone sequencer with an envelope and filter module. The sketch demonstrates how to control the littleBits envelope and filter modules with an Arduino. Read about the hardware and software design.

There are three source code files:

  1. ToneFreq.h: Symbolic constants for note pitches (e.g., NOTE_C4)
  2. ToneNote.h: Symbolic constants for note durations (e.g., QUARTER)
  3. GateModSeq.ino: Main sketch file

The two include files are also used in the simple tone sequencer project for littleBits Arduino.