# testaudio_callback - RetroBIOS - RetroBIOS

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# testaudio_callback - RetroBIOS

Type | test
Classification | pure_libretro
Source | https://github.com/libretro/libretro-samples
Version | v1
Profiled | 2026-03-25
Cores | testaudio_callback

Technical notes

Audio callback test core from libretro-samples. Tests the RETRO_ENVIRONMENT_SET_AUDIO_CALLBACK path where audio runs on a separate thread managed by the frontend. Generates a 300 Hz sine tone to validate callback-driven audio output.

No BIOS or firmware files required. Generated on 2026-03-25T14:56:43Z