[SOLVED] Liquidsoap does not recognise alsa

Liquidsoap does not recognise alsa

I want to setup an internet radio using Liquidsoap and Icecast 2.

I've installed Liquidsoap using Opam Package Manager as described in Liquidsoap Install Manual. I am able to stream a file running the following code:

output.icecast(%vorbis,
mount = "radio",
host = "MYSERVER", port = 8000,
password = "MYPASSWORD",
mksafe(single("SONG.mp3")))

with the use of ~/.opam/4.08.0/bin/liquidsoap radio.liq.

However, when I am trying to run output.alsa(input.alsa()) Liquidsoap returns Error 4: Undefined variable output.alsa.

I've checked if my alsa is running with services --status-all, tried to record something with arecord and then play it with aplay and looks like ALSA is working just fine. I am wondering if I may lack some specific packages?

Solution

After posting this question I've checked if ALSA has some OPAM package. And it looks like it does.

Running opam install alsa helped, I don't know why this information is not on the official Liquidsoap webpage.

I am leaving it here, so it may help somebody else.