PulseAudio 9.0 released

Changes at a glance

Automatic routing improvements
Beamforming and various other new features in the WebRTC echo canceller
Various improvements in module-role-cork and module-role-ducking
LFE remixing disabled by default
memfd-backed shared memory transport
Support for sample rates up to 384 kHz
webrtc-audio-processing dependency minimum version bumped to 0.2
Changed the C standard from C99 to C11.
Notes for end users

Automatic routing improvements

In 8.0, PulseAudio started to automatically switch to another profile when the device associated with the current profile is unplugged. That seemingly smart thing had some serious unintended consequences. One typical issue was that when unplugging headphones, PulseAudio might switch to S/PDIF output and not switch back to headphones when they are plugged in again. Another issue was that HDMI in many cases appears to get temporarily unplugged when the monitor goes to sleep mode, or even when switching the refresh rate of the monitor – PulseAudio 8.0 would move audio away from the HDMI monitor in these

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