Rhythm Box
A simple drum-machine/rhythm-box for OVOS - loops an 8-step (eighth-
note) beat pattern at a chosen tempo. All 4 drum sounds (kick, snare,
closed hi-hat, open hi-hat) are generated, not recorded - nothing to
source or license (see scripts/generate_drums.py). Same timing
philosophy as ovos-skill-metronome:
a background thread scheduling each step from a fixed accumulator,
extended to a step-sequencer instead of a single click.
Early 0.0.x release. Only 2 patterns (rock, four-on-the-floor) for now, deliberately kept small to prove the sequencing engine before building a genre library - see "Planned patterns" below.
Usage
"play a rock beat at 100 bpm"
"play a disco beat"
"start a drum loop"
"stop the beat"
"spil et rock beat på 100 bpm" (Danish)
"stop beatet" (Danish)
Bare "start a drum loop" resumes the last pattern/tempo used this session, or a 120 bpm rock beat if nothing has been played yet. Valid range is 40-220 bpm.
The two patterns
Both are an 8-step grid (one bar of eighth notes):
| Step | 1 | & | 2 | & | 3 | & | 4 | & |
|---|---|---|---|---|---|---|---|---|
| Rock: hi-hat | ● | ● | ● | ● | ● | ● | ● | ● |
| Rock: kick | ● | ● | ||||||
| Rock: snare | ● | ● | ||||||
| Four-on-the-floor: kick | ● | ● | ● | ● | ||||
| Four-on-the-floor: open hat | ● | ● | ● | ● | ||||
| Four-on-the-floor: snare | ● | ● |
Planned patterns (tracked as issues, not built yet)
- Swing/shuffle - needs a different timing model (triplet feel), not just a new hit-pattern on the existing straight-eighth grid.
- Funk, latin/bossa, half-time - half-time is cheap (reuses the existing 4-sample palette); funk/latin likely need more samples.
A real caveat: simultaneous hits
Some steps hit more than one instrument at once (kick + hi-hat on
beat 1, for example). Each is sent as a separate play_audio() call
in quick succession - this relies on the OVOS audio backend actually
mixing overlapping playback rather than one call cutting off the
previous. Most real setups do mix correctly (PulseAudio/PipeWire-level
mixing), but if a beat sounds thin or clipped on a given deployment,
this is a real, known reason why - not something silently assumed
away.
Install
pip install ovos-skill-rhythm-box
Development
See DEVELOPMENT.md.
Category
Entertainment
Tags
#music #drums #rhythm #beat
1 maintainer
Metadata
1 maintainer
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