How It Works

Clocking

• An external trigger on D5 advances the sequencer.

• The interrupt service routine only sets a flag.

• Step advance, record, and playback logic are handled in the main loop.

Recording and Playback

• Hold the D4 button to record.

• Release the D4 button to play back the stored sequence.

• Entering record mode from playback resets recording to step 0.

Sensor Mapping

The distance sensor is read continuously:

• In scale modes, hand distance is mapped to a note index.

• In linear mode, hand distance is mapped directly to the full 12-bit DAC range.