Setup & settings

The Setup tab (gear icon) is where you set key, scale, loop length, pad labels, MIDI input, and open help.

Most options apply to the loop you're editing now. Tempo and a few other settings apply to the whole song.

Music

Key and scale

Setting	Applies to
Key	Current loop
Scale	Current loop — Major, Natural Minor, Dorian, Mixolydian, Lydian, Major Pentatonic, Minor Pentatonic

Notes and chords on the pad grid follow these settings.

Loop length

4–32 bars for the current loop.

Quantize and humanize moved — they're now part of each track's settings pane (Sound Design → Track → Recording), so it's always clear which track they affect. See Recording → Quantize.

Screenshot: images/setup-music-full.webp
Setup Music section: key, scale, loop length.

Record offset

If notes land late when using Bluetooth headphones, adjust Record Offset here (in milliseconds).

Listen back to a recorded loop and nudge the value until hits sit on the beat. Wired headphones usually need little or no offset.

See Troubleshooting → Bluetooth.

Pads

Note names on pads — show labels like C4 or F#3 on synth pads in Notes and Chords mode.

MIDI

External controllers connect over USB or Bluetooth MIDI. MIDI input is off by default.

Setting	What it does
Enable MIDI Input	Master switch for all incoming MIDI
MIDI Channel	Omni (any channel) or a single channel 1–16
Pad Base Note	MIDI note for pad 1 in Drums and Sampler (default 36); consecutive chromatic notes map to pad 2, 3, …. Shows drum-kit and sampler (16-pad) ranges.
Connected Devices	Lists detected MIDI sources (including Apple's Network MIDI (Session 1) virtual endpoint)
Bluetooth MIDI	Opens the system pairing UI

Notes mode plays MIDI pitch directly. Drums and Sampler map consecutive notes to pads. Chords are not supported yet.

Full details: MIDI input.

Screenshot setup-midi-full.webp

Setup MIDI section with enable toggle, channel, drum base note, and connected devices.

Song-wide settings

These apply to the entire song, not just one loop:

Setting	Where to change it
BPM	Control bar → BPM
Metronome	Control bar
Preroll	Control bar
Drone sound	Sound Design → Drone

Help & About

Documentation opens https://arc24.app/docs in your browser (this guide). Feedback & Support opens https://arc24app.userjot.com/?cursor=1&order=top&limit=10 in your browser.

iPad

On iPad, Setup appears in the right pane with the same sections.