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PulseAudio not supported, buggy with ALSA ... - VirtualBox
https://www.virtualbox.org/ticket/482
PulseAudio is not supported natively, and using the ALSA PulseAudio driver and using ALSA from VirtualBox results in very erratic behavior, including crashes in programs running in the guest and failure of the guest tools to start.
PulseAudio fails, with ALSA crashes - Oracle VM VirtualBox
https://www.virtualbox.org/ticket/5184
Virtualbox will immediately abort (in a way as if someone pulled the plug had it been a real machine: no file system flushing etc.) Because of the non-proper error handling of ALSA (on a closed down pulseaudio daemon). Using ALSA driver with ALSA in turn using pulse is a permanent hazard to virtualbox.
virtualbox.org • View topic - ALSA Audio not working anymore
https://forums.virtualbox.org/viewtopic.php?t=16551
With once exception: When you create a new VM, this VM will have ALSA sound enabled. So if you created a new VM, start it and your ALSA sound system on the host is not capable of mixing channels, then the sound will stop working. Please check if your VM settings. Apart from this, PulseAudio is the proposed audio backend on recent Linux distributions.
What is the relation between ALSA and PulseAudio sound ...
https://askubuntu.com/questions/581128/what-is-the-relation-between-alsa-and-pulseaudio-sound-architecture
ALSA is unable by itself to be used by multiple applications, so PulseAudio provides this functionality among others. Summarized: ALSA - dealing with the hardware, basically owning it PulseAudio - a software proxy providing additional featues (mixing, equalizer) between your application and the ALSA/OSS subsystem
pulseaudio now supported in virtualbox / GNU/Linux ...
https://bbs.archlinux.org/viewtopic.php?id=41678
An application like Rhythmbox relies on GStreamer to decode sound files from compressed form into raw audio. GStreamer in turn passes the audio down to ESD, and ESD delivers it to the ALSA hardware driver. In this situation, PulseAudio replaces ESD without affecting the rest of the pipeline.
VirtualBox and Alsa audio driver setting : pop_os
https://www.reddit.com/r/pop_os/comments/c7u8hn/virtualbox_and_alsa_audio_driver_setting/
VirtualBox and Alsa audio driver setting Recently VirtualBox has stopped working on Pop hosts when the alsa audio driver is selected in the VMs settings. On one system it even cuts out audio for the entire host when the VM runs, but in all tests there is no audio in the VM. Setting it to pulse audio driver works as expected.
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