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alsa-mixer: Improve documentation in texas-instruments-pcm2902.conf

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Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/667>
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Tanu Kaskinen 2021-12-16 12:48:20 +02:00
parent 741a96f20b
commit ece71de3fd
1 changed files with 14 additions and 10 deletions
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24
src/modules/alsa/mixer/profile-sets/texas-instruments-pcm2902.conf
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@ -13,22 +13,26 @@
# You should have received a copy of the GNU Lesser General Public License # You should have received a copy of the GNU Lesser General Public License
# along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. # along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
; Behringer U-Phoria UMC22 ; Texas Instruments PCM2902
; ;
; Default mapping only allows to use stereo input and sound card has two ; This is a generic chip used in multiple products, including at least
; physical input channels. ; Behringer U-Phoria UMC22, Intopic Jazz-UB700 and some unbranded "usb mini
; microphone".
; ;
; However in case of only using a single input channel (like condenser ; Behringer UMC22 has stereo input (representing two physical mono inputs),
; microphone) only one channel will have any sound, which is often ; others have mono input.
; inconvenient for casual use.
; ;
; This config includes mono input options which makes it much more ; Since the UMC22 card has only stereo input PCM device but is commonly used
; friendly in single input configuration. ; with mono mics, we define special mono mappings using "mono,aux1" and
; "aux1,mono" channel maps. If we had only had the standard stereo input
; mapping, the user would have to record stereo tracks with one channel silent,
; which would be inconvenient.
; ;
; This config also removes default digital input/output mappings that do ; This config also removes default digital input/output mappings that do
; not physically exist on this card. ; not physically exist on cards that we've seen so far.
; ;
; Added by Nazar Mokrynskyi <nazar@mokrynskyi.com> ; Originally added by Nazar Mokrynskyi <nazar@mokrynskyi.com> for Behringer
; UMC22.
[General] [General]
auto-profiles = yes auto-profiles = yes