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PulseAudio - OpenWrt Wiki
https://openwrt.org/docs/guide-user/hardware/audio/pulseaudio
PulseAudio: Why software mixing? “Many people wonder why have software mixing at all if you have hardware mixing? The thing is, hardware mixing is a thing of the past, modern soundcards don't do it anymore. Precisely for doing things like mixing in software SIMD CPU extensions like SSE have been invented.
Frequent question: What is PulseAudio in Linux?
https://frameboxxindore.com/linux/frequent-question-what-is-pulseaudio-in-linux.html
PulseAudio is a software mixer, on top of the userland (like you’d run an app). When it runs, it uses Alsa – without dmix – and manages every kind of mixing, the devices, network devices, everything by itself. In 2014, you can still run only ALSA. Is Jack better than ALSA?
PulseAudio - LinuxReviews
https://linuxreviews.org/PulseAudio
PulseAudio will up or down-mix the source audio to the set sample-rate and then up or down-mix to the sound cards highest supported sample-rate. This means that if you set default-sample-rate to 96000 and you play 44.1 kHz on a sound card with a 48 kHz limit the audio gets up-mixed to 96 kHz and then down-mixed to 48 kHz.
What is PulseAudio Ubuntu?
https://frameboxxindore.com/linux/what-is-pulseaudio-ubuntu.html
In the typical Linux system, PulseAudio mixes audio from all your different apps and feeds them up the chain to ALSA. With just pure ALSA, you need dmix to mix multiple apps. Without it, ALSA can only play an audio stream from one app at a time. How do you use PulseAudio equalizer? Using Pulse Audio Equalizer
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