=== Audio Stack Improvements

Contact: Christos Margiolis <christos@FreeBSD.org>

I have been working on the audio stack since 2024Q1.
Below is a list of the previous status reports:

link:https://www.freebsd.org/status/report-2024-01-2024-03/#_audio_stack_improvements[2024Q1] URL: link:https://www.freebsd.org/status/report-2024-01-2024-03/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2024-04-2024-06/#_audio_stack_improvements[2024Q2] URL: link:https://www.freebsd.org/status/report-2024-04-2024-06/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2024-07-2024-09/#_audio_stack_improvements[2024Q3] URL: link:https://www.freebsd.org/status/report-2024-07-2024-09/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2024-10-2024-12/#_audio_stack_improvements[2024Q4] URL: link:https://www.freebsd.org/status/report-2024-10-2024-12/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2025-01-2025-03/#_audio_stack_improvements[2025Q1] URL: link:https://www.freebsd.org/status/report-2025-01-2025-03/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2025-04-2025-06/#_audio_stack_improvements[2025Q2] URL: link:https://www.freebsd.org/status/report-2025-04-2025-06/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2025-07-2025-09/#_audio_stack_improvements[2025Q3] URL: link:https://www.freebsd.org/status/report-2025-07-2025-09/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2025-10-2025-12/#_audio_stack_improvements[2025Q4] URL: link:https://www.freebsd.org/status/report-2025-10-2025-12/#_audio_stack_improvements[] +
link:https://www.freebsd.org/status/report-2026-01-2026-03/#_audio_stack_improvements[2026Q1] URL: link:https://www.freebsd.org/status/report-2026-01-2026-03/#_audio_stack_improvements[]

Important work since link:https://www.freebsd.org/status/report-2026-01-2026-03/#_audio_stack_improvements[last report]:

* man:sound[4], device drivers, and man:virtual_oss[8] cleanups, fixes and improvements.
* man:sound[4] security fix (link:https://www.freebsd.org/security/advisories/FreeBSD-SA-26:27.sound.asc[SA]).
* man:virtual_oss[8] security fix (link:https://cgit.freebsd.org/src/commit/?id=453de99b386d40754a038cc4b804f4c7a3b04624[commit]).
* Introduction of an audio group (GID 43) and use of it in all sound device nodes (link:https://cgit.freebsd.org/src/commit/?id=a6aa95eba6ee2dd199d6cb8063dbaccd8a6f7512[commit]).
* Support for the Roland UA-33 USB audio interface.
* man:virtual_oss[8] service option in the installer.
* man:kqueue[2] improvements for man:sound[4], thanks to Goran Mekić <meka@tilda.center>.
* Better hot-swapping (link:https://cgit.freebsd.org/src/commit/?id=9fb56421425fa35e56ce294284c08b09852052a5[commit]).
* EQ controls for man:sndctl[8] and man:mixer[8].

You can also follow the development process on the FreeBSD Foundation's link:https://github.com/FreeBSDFoundation/status-updates/tree/main/Christos_Margiolis[status-updates repository], where I post weekly reports.

Sponsor: The FreeBSD Foundation