How it works: Linux audio explained

“There’s a problem with the state of Linux audio, and it’s not
that it doesn’t always work. The issue is that it’s
overcomplicated. This soon becomes evident if you sit down with a
piece of paper and try to draw the relationships between the
technologies involved with taking audio from a music file to your
speakers: the diagram soon turns into a plate of knotted spaghetti.
This is a failure because there’s nothing intrinsically more
complicated about audio than any other technology. It enters your
Linux box at one point and leaves at another.

“If you’ve had enough of this mess and want to understand just
how all the bits fit together, we’re here to help – read on to
learn exactly how Linux audio works!

“If we were drawing the OSI model used to describe the
networking framework that connects your machine to every other
machine on the network, we’d find clear strata, each with its own
domain of processes and functionality. There’s very little overlap
in layers, and you certainly don’t find end-user processes in layer
seven messing with the electrical impulses of the raw bitstreams in
layer one.”

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