Three steps
The Looper lives inside the Recording Booth, under the Sampler tab. The workflow is simple:
- Record. Tap REC and make sound. Beatbox, sing, play an instrument, or hold your phone up to a speaker. The Looper captures up to 30 seconds and auto-stops after 2 seconds of silence.
- Process. The Looper analyzes your recording automatically - detects the tempo, finds beat 1, calculates slice points, and aligns everything to an 8-beat grid. This happens in seconds.
- Play. Tap any of the 8 slices to trigger it, or hit Play All to hear the full loop in sequence. Save the slices as a kit and use them in the main sequencer.
Automatic BPM detection
The Looper runs a multi-phase analysis algorithm to find the tempo of your recording. It tests multiple BPM candidates across the 60-180 BPM range, scores each one, and picks the best match. Accuracy is around 95% for recordings with a clear rhythmic pulse.
If the auto-detection doesn't nail it, you can adjust the BPM manually. The slices re-align automatically when you change the tempo - beat 1 stays locked, and the slice grid recalculates around it.
8-slice grid
Every recording gets sliced into 8 beat-aligned segments. Each slice maps to one beat in the loop. You can:
- Tap individual slices to trigger them on demand.
- Play the full loop with automatic crossfade between slices.
- Adjust alignment by swiping the waveform to shift beat 1.
- Fine-tune offset with step controls for sub-beat adjustments.
The waveform display shows your full recording with the slice grid overlaid, so you can see exactly where each beat lands.
What to record
The Looper works best with rhythmic material that has a steady pulse:
- Beatboxing - the classic use case. Beatbox a pattern, let the Looper slice it, sequence the slices.
- Instrument loops - strum a guitar pattern, play a bass riff, tap out a rhythm on anything.
- Vocal loops - sing a melody, hum a bass line, record a spoken word phrase.
- Found sounds - record anything with rhythm. A ticking clock, footsteps, a washing machine.
From Looper to sequencer
Save your sliced loop as a Sampler kit. Switch to the main beat grid, load the kit in the Sampler tab, and each of the 8 slices appears as a row in the step sequencer. Place slices on different steps to create new patterns from your recording. Combine it with drums, bass, and synths from the other tabs.
Technical details
- 16-phase iterative loop extraction algorithm
- Onset detection via energy flux and amplitude peaks
- Phase-locked loop (PLL) for beat-sync refinement
- 25ms crossfade between slices (industry standard)
- WAV export at 44.1kHz, 16-bit PCM
- Session persistence - your recording survives app restarts