Open-source macOS menu bar app

Apple Music that knows when to step aside.

FlowSound fades and pauses Apple Music when other apps play audio, then restores it when things become quiet again.

Built for macOS 26+. Apple Music only. Local-first, no analytics.

Featured on

Audio focus for Apple Music

No overlap. No sudden silence.

Without FlowSound manual

Apple Music

Video / other audio

Two soundtracks compete until you pause one by hand.

With FlowSound automatic

Apple Music

Video / other audio

fade out pause resume

Music steps aside, then returns from the same paused position.

Avoid overlapping audio. Avoid sudden silence. Stay in flow.

Demo

The menu bar app listens for app audio activity, fades Apple Music out, pauses it, then restores the previous volume.

Trust

Lives in the menu bar. Turn it on or off anytime.

No recording, no uploads, no analytics, no server.

Built in Swift with Core Audio and Apple Music automation.

Permissions

FlowSound needs a few local permissions to do one job. It does not use a network service.

Used to detect whether other apps are producing audio.

Used to control Apple Music volume and playback.

Optional, only if you enable Launch at Login.

FAQ

Does FlowSound record audio?

No. FlowSound only computes local audio activity levels.

Does it upload anything?

No. FlowSound has no analytics, no server, and no upload feature.

Does it work with Spotify?

Not yet. FlowSound currently supports Apple Music only.

Why does macOS warn me when opening it?

Current builds are ad-hoc signed tester builds until a Developer ID notarized release is available.