Arpeggio
Tempo-synced arpeggiator that sequences held notes in configurable patterns.
truce-example-arpeggio
rebuilds its sequence into reused, pre-sized buffers so process never
allocates on the audio thread - its test uses the
rt-paranoid checker to assert it stays
allocation-free.
#What it demonstrates
- Tempo-synced MIDI processing using
context.transport.tempo - Enum parameter (
EnumParam<ArpPattern>) with dropdown widget - Stateful MIDI effect: tracks held notes, manages step counter and gate timing
- Octave stacking and directional patterns (Up, Down, Up/Down, Random)
- Rebuilding per-block DSP state without allocating on the audio thread
#Parameters
| Name | Range | Unit | Description |
|---|---|---|---|
| Rate | 1 to 8 | -- | Note divisions (1=whole, 4=quarter, 8=eighth) |
| Gate | 0.1 to 1.0 | % | Note length as fraction of step |
| Octaves | 1 to 4 | -- | Octaves to stack above held notes |
| Pattern | Up/Down/Up-Down/Random | -- | Arp direction |