Sampling

spool. turns any sound into an instrument — your voice, a guitar, a kettle, or a whole song from your library. Sampling is a Spool Pro feature.

Two ways in

With the SAMPLER or DRUM engine selected, the waveform editor offers two source buttons:

• MIC — records from the microphone, up to about 12 seconds. Tap it, make your sound, tap stop.
• FILE — imports audio from the Files app. And here’s the fun part: you can import a whole song — a crop screen opens with the full waveform, where you pinch to zoom and drag the handles around just the bar or hit you want, audition it, and confirm. Imported stereo files stay stereo.

You can also LIFT a section of tape and DROP it straight into the sampler or a drum kit — no export round-trip.

Shaping the sample

The editor shows the waveform with draggable in/out handles. CROP commits to the visible window, RESET brings the whole recording back, and ▶ auditions what you’ve got.

Playing it

• In SAMPLER, your sample plays across the whole keyboard, pitched chromatically — with START · END · LOOP · PITCH on the knobs.
• In DRUM, the sample is chopped into slices across the keys — see Drums for kit-building.

A note on privacy

Microphone audio is processed entirely on your device to make sounds — it is never transmitted anywhere. iOS asks permission before the mic is first used, and you can revoke it any time in the Settings app. See the privacy policy.

Next: MIDI →