USB Sound in Linux

nahgoe

I've a USB headset here, and while it works, i have no way of changing either the input or output volume. I'm using it for my software phone in work, but people complain that they can hardly hear what i'm saying. Anyone have any ideas how i'd change the volumes on it? Alsamixer does nothing

Also, has anyone managed to get more than one application to use a sound card at once? I've tried before, but never managed it

Thanks

nadir

im not sure about the volume, im imagining you need to set up some sort of additional volume device, like the way for surround sound.

as for multiple sounds, you really need a card withy hardware mixing, otherwise you are stuck using dmix

pcm.!default {
type plug
slave.pcm "dmixer"
}

pcm.dsp {
type plug
slave.pcm "dmixer"
}

pcm.dmixer {
type dmix
ipc_key 1024
slave {
pcm "hw:0"
period_time 0
period_size 512
buffer_size 32768 #modify this to match your card's buffer size
rate 48000
}
bindings {
0 0
1 1
}
}

ctl.mixer {
type hw
card 0
}

niallb

There might be an extra control for the mic that you're missing.
A control such as "Toggle +20dB gain" is common, and sounds
like it would fix your problem.

Take a close look on a full set of alsamixer controls.

NiallB