SoundU 0.1.0 Beta 1

First public beta of SoundU, a per-app volume mixer for the macOS menu bar that keeps your music at the level you set during WhatsApp and FaceTime calls.

Highlights

• Per-app volume (0–200 %, limiter above 100 %), mute and output device, with live meters.
• Call Guard: other apps keep their volume during calls; call audio is never touched.
• System Sounds strip to turn notifications down or mute them.
• Universal app (Apple silicon and Intel), macOS 14.4 or later.

Install

1. Download SoundU-0.1.0.zip, unzip, and move SoundU.app to Applications.
2. SoundU is not notarized yet: on first launch open System Settings → Privacy & Security and click Open Anyway.
3. Click Allow when macOS asks to let SoundU record audio from other apps (nothing is recorded or saved).

Known issues

• The panel can freeze for up to a minute on first launch while the permission prompt is pending.
• About 27 ms of added audio delay per routed app.
• On Bluetooth outputs, the first instant of a notification can play before the System Sounds volume applies.

SHA-256 of the zip is in SoundU-0.1.0.zip.sha256. Full details: README · Changelog.