Hi everybody!
I am asking for some help because after a week of tests and googling I
have to surrender: I cannot solve a problem that for some experienced
ALSA user is maybe trivial.
What I want to achieve is to mix the audio coming from 2 different
"sources" and route it to be the "input" of a "virtual sound card" for
being then used in Google Hangout / Skype, or in a recording
application as the input channel.
The two sources i have to mix are:
A) An external USB microphone (a Blue Yeti, working perfectly per se)
B) The system audio of my computer (meaning anything that goes out
from the computer loudspeakers)
I started loading (successfully, so this can be taken as granted) the
kernel module snd-aloop, for creating the "virtual soundcard".
But here comes the first question: why loading this module triggers
the creation of TWO devices, called both Loopback (Device 0 and Device
1) instead of a single one?
Then I tried to set up the .asoundrc file, that is the following
# Virtual Sound Card
pcm.VirtualSoundCard
{
type asym
card "Loopback"
playback.pcm SystemOut
capture.pcm in
}
# ALIAS for Blue Yeti USB Microphone
pcm.BlueYeti {
type hw
card "Microphone"
}
pcm.SystemOut
{
type hw
card "PCH"
}
pcm.in
{
type multi
card "Loopback"
slave.a.pcm "BlueYeti"
slave.b.pcm "SystemOut"
}
I have the feeling I am missing something, but I wasn't able to find a
good, well documented example to guide me through the multiple
parameters of the plugins.
I hope you can help...
Marco Zambianchi
PGP Public Key: http://goo.gl/K6Rrlx
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