[SOLVED] Switch all audio input/output to USB headset

Hi, I have a USB headset that I frequently plug/unplug from the computer. Is there a way to make it the default sound device when plugged, and automatically switch back to the motherboard's on-board audio device when unplugged?
Last edited by stavrakis (2012-04-26 15:57:56)

I have an Intel HDA 5.1 internal audio card, and a 5.1 USB headset, using the modules snd_hda_intel and snd_usb_audio respectively. The internal card is set as card 0, and the usb headset is set as card 1.
I'm using ALSA right now, but I wouldn't have a problem switching to Pulseaudio if it's easier.
EDIT: I used pulseaudio and solved it for applications that are not already playing sound (not shown on pavucontrol's Playback tab)
I created a udev rule, which executes a script when card1 is inserted, since I know it is the USB sound device:
SUBSYSTEM=="sound", KERNEL=="card1", ACTION=="change", RUN+="/home/stavros/bin/pulse-ins.sh"
This script (pulse-ins.sh) executes another script as the current user:
#!/bin/bash
su -c "/home/stavros/bin/pulse_insert_card.sh & exit" stavros
pulse_insert_card.sh contains the following:
#!/bin/bash
/usr/bin/pacmd set-default-sink alsa_output.usb-0d8c_USB_Sound_Device-00-Device.analog-surround-51
/usr/bin/pacmd set-default-source alsa_input.usb-0d8c_USB_Sound_Device-00-Device.analog-stereo
These 2 scripts and the udev rule automatically change pulseaudio's default output & mic input when the card is inserted. However, applications already playing music have to be switched manually through pavucontrol.
Sometimes, the card is incorrectly identified as "Analog Stereo Duplex", with no 5.1 option. In that case killing pulseaudio and letting it start again solves the problem.
Last edited by stavrakis (2012-03-31 11:49:43)

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[SOLVED] Switch all audio input/output to USB headset

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