Emanoil Kotsev wrote: > excuse me but you are not correct > > use amixer > > amixer | grep Input > Simple mixer control 'Digital Input Source',0 > Items: 'Analog Inputs' 'Digital Mic 1' 'Digital Mic 2' 'CD' > Item0: 'Analog Inputs' > Simple mixer control 'Digital Input Source',1 > Items: 'Analog Inputs' 'Digital Mic 1' 'Digital Mic 2' 'CD' > Item0: 'Analog Inputs' > > and use alsamixer or similar to turn your mic on > > If your driver is not properly configured you can have some options mixed up > so play around > > I'm personally using following to test input > > 1) find out cards and inputs > > shell> cat /proc/asound/cards > 0 [Intel ]: HDA-Intel - HDA Intel > HDA Intel at 0xff950000 irq 22 > 1 [HVR900 ]: USB-Audio - WinTV HVR-900 > WinTV HVR-900 at usb-0000:00:1a.7-3, high speed > 2 [Webcam ]: USB-Audio - Philips SPC 1000NC Webcam > Philips CE Philips SPC 1000NC Webcam at > usb-0000:00:1a.7-5.4, high speed > > => I'm going to use the Webcam built in mic => card # 2 > > 2) find out the input > > shell> cat /proc/asound/devices > 0: [ 0] : control > 1: : sequencer > 6: [ 0- 2]: hardware dependent > 7: [ 0- 3]: hardware dependent > 16: [ 0- 0]: digital audio playback > 17: [ 0- 1]: digital audio playback > 19: [ 0- 3]: digital audio playback > 24: [ 0- 0]: digital audio capture > 32: [ 1] : control > 33: : timer > 56: [ 1- 0]: digital audio capture > 64: [ 2] : control > 88: [ 2- 0]: digital audio capture > > > => my input is the capture on the second card > > 88: [ 2- 0]: digital audio capture > > 3) so no we can test the mic > > shell> arecord -c1 -Dplughw:2,0 -f cd -vv /dev/null > > Recording WAVE '/dev/null' : Signed 16 bit Little Endian, Rate 44100 Hz, > Stereo > Plug PCM: Route conversion PCM (sformat=S16_LE) > Transformation table: > 0 <- 0 > 1 <- 0 > Its setup is: > stream : CAPTURE > access : RW_INTERLEAVED > format : S16_LE > subformat : STD > channels : 2 > rate : 44100 > exact rate : 44100 (44100/1) > msbits : 16 > buffer_size : 22050 > period_size : 5513 > period_time : 125011 > tstamp_mode : NONE > period_step : 1 > avail_min : 5513 > period_event : 0 > start_threshold : 1 > stop_threshold : 22050 > silence_threshold: 0 > silence_size : 0 > boundary : 1445068800 > Slave: Hardware PCM card 2 'Philips SPC 1000NC Webcam' device 0 subdevice 0 > Its setup is: > stream : CAPTURE > access : MMAP_INTERLEAVED > format : S16_LE > subformat : STD > channels : 1 > rate : 44100 > exact rate : 44100 (44100/1) > msbits : 16 > buffer_size : 22050 > period_size : 5513 > period_time : 125011 > tstamp_mode : NONE > period_step : 1 > avail_min : 5513 > period_event : 0 > start_threshold : 1 > stop_threshold : 22050 > silence_threshold: 0 > silence_size : 0 > boundary : 1445068800 > ### + | 10%^C > Aborted by signal Interrupt... > > regards > >
Wonderful explanation of the magic that alsa does! Thanks a ton. I didn't know about "cat /proc/asound/devices" before. Regards. -- Please reply to this list only. I read this list on its corresponding newsgroup on gmane.org. Replies sent to my email address are just filtered to a folder in my mailbox and get periodically deleted without ever having been read. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
