Splitwave 0.1.0

The first public release of Splitwave: send each Mac app's sound to the output you choose.

Download Splitwave.dmg below, open it and drag Splitwave into Applications. Requires macOS 14.2 or later; runs on Apple silicon and Intel.

First launch

This build isn't notarized by Apple, so macOS blocks it the first time. Open System Settings › Privacy & Security, scroll down and click Open Anyway next to Splitwave. Then allow system audio recording when asked; Splitwave needs it to move an app's sound and never records or saves anything.

What's in it

• An output per app: one device, or several at once under Also play on
• A volume, mute and live level meter for every app
• Setups: save every app's outputs and volume and switch in one click, from Shortcuts (splitwave://setup/Name) or the command line
• Routes fall back to the system output when a device disconnects and come back when it reconnects
• Routes rebuild themselves when Bluetooth headphones switch to call mode
• A splitwave command-line tool inside the app

Known limits

• Browsers route as a whole (every tab plays through one process)
• On several outputs at once, Bluetooth devices run 100–200 ms behind wired ones
• Some copy-protected video plays silently once routed