# audioLatencyMs

> The undocumented macOS preference that sets AirPlay's system audio buffer in milliseconds.

Updated 2026-10-06. Canonical page: https://lagless.app/glossary/audiolatencyms/

> `audioLatencyMs` is an integer preference in the `com.apple.airplay` domain, read from root's preferences, that overrides the 2000 ms buffer macOS uses for AirPlay system audio. 350 ms is the lowest stable value; 250 ms is silent.

Related: [audioLatencyMs explained](/guides/audiolatencyms-explained/) · [Why AirPlay goes silent at 250 ms](/guides/airplay-silent-at-250-ms/)