This is a golang ALSA client implementation, without cgo! Unfortunately, doing it without cgo means throwing away many years of compatibility work that has been put into libalsa. So be warned, this library is not likely to work with a lot of the more colorful audio cards out there, and is not likely to work on platforms other than x86_64. (Though, someone has nicely done some work on ARM. Thanks!)
But fear not! Go is fun, and I tried to keep the library on the simple side, so adding in support for what your audio card needs might actually be just a nice afternoon of programming. The hardest part for me was just trying to understand all of the alsa terminology.
For a simple example of synthesized playback, the beep command will produce a sine wave for a few seconds on each detected ALSA output:
go get github.com/yobert/alsa/cmd/beep
$GOPATH/beep
And for recording from a microphone into a WAV file:
go get github.com/yobert/alsa/cmd/record
$GOPATH/record
This example does recording and playback, but it's got a really buggy ring buffer going on:
go get github.com/yobert/alsa/cmd/echoback
$GOPATH/echoback
This module makes syscalls with pointers to memory buffers that are in garbage collectable memory. I have a feeling this isn't safe, but it hasn't crashed on me yet.
Thanks so much for the help! Thanks! See AUTHORS for a list. Pull requests welcome from anybody, regardless of skill level.
You may be interested in https://github.com/jfreymuth/pulse which is a lot less likely to crash and will probably work with your sound card.