File apulse.conf of Package apulse
APULSE_CAPTURE_DEVICE=${APULSE_CAPTURE_DEVICE:='plughw:0,0'};
APULSE_PLAYBACK_DEVICE=${APULSE_PLAYBACK_DEVICE:='default'};
APULSE_CAPTURE_DEVICE=${APULSE_CAPTURE_DEVICE:='plughw:0,0'};
APULSE_PLAYBACK_DEVICE=${APULSE_PLAYBACK_DEVICE:='default'};