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Meta Horizon OS Audio

Updated: Apr 15, 2026

This page describes the OS-level audio properties and runtime behavior on Meta Horizon OS. These defaults apply at the platform level and affect how Unreal Engine’s audio system captures and renders audio on Meta Quest devices.

Microphone

Default Microphone Properties

Sample depth: 32-bit

Sample rate: 48000 Hz

Channels: 1

Runtime Microphone Muting

Meta Horizon OS has the ability to mute the microphone in your app. This can happen for a number of reasons, including:

Android audio policies around multi-app microphone access might mute the microphone in your app. If this happens, the microphone stream isn’t closed and is provided empty audio data. Your app can check whether the microphone is receiving empty audio data by using the Android AudioManager⁠ and your app’s AudioRecordingConfiguration⁠.

AudioManager.getActiveRecordingConfigurations()⁠ returns the list of device configurations for your app in instances of AudioRecordingConfiguration⁠.

AudioRecordingConfiguration.isClientSilenced()⁠ returns whether your microphone recording stream is receiving empty audio data based on Android microphone access policies.

Meta Horizon OS system processes may mute the microphone in your app. In this scenario, your app’s microphone stream isn’t closed, but receives empty audio data.

AudioManager.isMicrophoneMute()⁠ returns whether your microphone recording stream is receiving empty audio data because its been muted by the Meta Horizon OS.

Audio Rendering

Default Rendering Properties

Sample depth: 32-bit

Sample rate: 48000 Hz

Sample buffer size (Per Channel): 192 samples

Channels: 2

Meta Horizon OS has the ability to convert sample rates. We encourage developers to use the AAUDIO_PERFORMANCE_MODE_LOW_LATENCY⁠ flag and use the default sample buffer size to minimize rendering latency.

Unreal Engine audio configuration

The Meta Horizon OS native audio sample rate is 48000 Hz. By default, new Unreal Engine projects use a sample rate of 44100 Hz, which causes the platform to resample audio at runtime and can increase latency. To match the platform’s native sample rate, set the following in your project’s DefaultEngine.ini: