Return 1.0.1

Return 1.0.1

Ultra-low-latency in-ear monitoring for macOS — hear your microphone through your headphones in real time.

Download

• Return.dmg — drag Return into Applications

Why it’s fast

Return is built for one of the smallest software delays among open-source mic monitors:

• Native Core Audio HAL I/O (no high-level engine graph)
• Preferred 32-frame device buffers when hardware allows (~0.7 ms at 48 kHz)
• Compact lock-free C ring buffer for the software bridge

Remaining delay is mostly your interface and headphones.

Requirements

• macOS 14+
• Microphone permission on first launch

Gatekeeper note

This build is ad-hoc signed, not notarized. If macOS blocks the first open: Control-click the app → Open → confirm.

What’s included

• Menu-bar monitoring toggle and volume
• Restores original Core Audio buffer sizes when monitoring stops
• MIT licensed source: build with ./build.sh package