Playtest build macOS 11+ Apple Silicon

Make it. Mosh it.

Mosh is a music studio for your Mac with a creature living in the corner. Drop in a beat, record a vocal, and tell Moshi what you want changed.

Get the playtest build See what’s inside

The Mosh window: a seven-track session with guitar, drums, 808, lead vocal, doubles and backgrounds. The lead vocal's hook clip is selected, with AutoTune, a compressor and an EQ on the track, and Moshi's reply line at the bottom. — Colorway

The real app, on a real song. Pick a colorway and the whole studio follows.

Everything a song needs. Nothing to set up.

Mosh is a native Mac app, not a browser tab. The drum kit, the synth, the tuner and the mix tools are already inside when you open it.

Start with a beat

One button drops a drum beat onto the built-in kit. Add a MIDI track, pick a synth preset, and write the 808 underneath it.

+ Drum beat

Drum and 808 patterns in the arrangement

Record the vocal

Arm a track, set a count-in, and sing. Takes land on the timeline as clips you can cut, double and stack into a hook.

Count-in · 1 bar

Lead, double and background vocal takes on the timeline

Tune it and mix it

Mosh AutoTune, a compressor and a four-band EQ ship with the app. Your own VST3 and AU plugins load beside them and open in their own windows.

+ Add plugin

Mosh AutoTune and Compressor on the lead vocal

Re-Imagine a take

Select a clip, describe where it should go, and Mosh renders a new version of that take on your own Mac. Audition it, then keep it or throw it away.

Runs locally

The selected hook clip on the lead vocal track

The Open Re-Imagine button in the track inspector

Say it. Moshi does it.

Type what you want in plain words. Moshi makes the change with the same commands your own clicks use, so it shows up in History and one undo takes it back.

Try

A replay of real replies from the session above. The live Moshi is in the app.

Idle Hanging out until you ask.
Listening Eyes wide while the mic is live.
Pleased A laugh when your change lands.
Asleep Curls into a ball while you record, so nothing distracts the take.

Two Macs. One song.

Start a session, send a room code, and you are both inside the same project, each on your own machine.

Invite a friend

Each of you takes a track, and a small lock shows who is editing what. The song syncs between you. Your voices don’t, so keep a call open on the side.

Your phone is a pad Early

Scan a code with the iPhone camera and a controller for the session opens in Safari. There is no app to install.

Outro · playtest

Come break it.

Mosh is in playtest with friends. The guide takes about ten minutes, and everything you run into makes the next build better.

Open the playtest guide