How to select an input/output channel for my audio interface (Soundcraft Signature MTK12)
Hi, my device shows up in sound settings but there's no option to output on channel 11/12 and have input on 7/8. Online searches told me it should be plug and play with this soundcard but I can't get an audio out.
Solution
I figured it out, created a new pipewire stream by hand and using it as output. (~/.config/pipewire/pipewire.conf.d/10-mtk-sink.conf)
also volume was quite low; amixer -c0 showed it was set to 99 instead of 127 on channels 11/12. Fix (replace numid with the control id found in amixer -c0 controls):
mixer -c0 cset numid=5 127,127,127,127,127,127,127,127,127,127,127,127
context.modules = [
{ name = libpipewire-module-loopback
args = {
capture.props = {
media.class = Audio/Sink
node.name = mtk_aux_11_12
node.description = "MTK AUX 11/12"
audio.position = [FL FR]
}
playback.props = {
node.name = "mtk_aux_11_12.output"
node.passive = true
target.object = "alsa_output.usb-Soundcraft_Soundcraft_Signature_12_MTK-00.pro-output-0"
audio.position = [AUX10 AUX11]
}
}
}
]also volume was quite low; amixer -c0 showed it was set to 99 instead of 127 on channels 11/12. Fix (replace numid with the control id found in amixer -c0 controls):
mixer -c0 cset numid=5 127,127,127,127,127,127,127,127,127,127,127,127
