deloptes <delop...@gmail.com> writes:
> Rodolfo Medina wrote:
>
>> I just bought an external USB audio card. I plugged it into the USB port
>> of my
>> PC and plugged a 3.5mm jack microphone into the `mic' input of the card.
>> It is shown in lsusb:
>>
>> $ lsusb
>> Bus 002 Device 005: ID 17ef:602e Lenovo
>> Bus 002 Device 003: ID 046d:c312 Logitech, Inc. DeLuxe 250 Keyboard
>> Bus 002 Device 002: ID 0438:7900 Advanced Micro Devices, Inc.
>> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 001 Device 010: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio
>> Controlle Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp.
>> RTS5129 Card Reader Bus 001 Device 002: ID 0438:7900 Advanced Micro
>> Devices, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root
>> hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>
>>
>> and also in arecord:
>>
>> $ arecord --list-devices
>> **** List of CAPTURE Hardware Devices ****
>> card 1: Generic [HD-Audio Generic], device 0: ALC662 rev3 Analog [ALC662
>> rev3 Analog]
>> Subdevices: 0/1
>> Subdevice #0: subdevice #0
>> card 1: Generic [HD-Audio Generic], device 2: ALC662 rev3 Alt Analog
>> [ALC662 rev3 Alt Analog]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 2: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>>
>> Besides, I ran alsamixer, selected the USB card and unmuted everything.
>> But
>> then, when I try to record, no sound is recorded. I do:
>>
>> $ sox -t alsa hw:2,0 output.wav
>>
>> , or
>>
>> $ arecord -f S16_LE -D hw:2,0 -r 96000 test.wav
>>
>> , or also within Audacity. But nothing, my voice is not recorded. Please
>> help whoever can.
>
>
> A short howto I wrote years ago
>
> 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
Here are my outputs:
$ cat /proc/asound/cards
0 [HDMI ]: HDA-Intel - HDA ATI HDMI
HDA ATI HDMI at 0xfea64000 irq 39
1 [Generic ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xfea60000 irq 16
2 [Device ]: USB-Audio - USB PnP Sound Device
C-Media Electronics Inc. USB PnP Sound Device at
usb-0000:00:12.0-1.3, full spe
$ cat /proc/asound/devices
2: [ 0] : control
3: [ 0- 3]: digital audio playback
4: [ 0- 0]: hardware dependent
5: [ 1] : control
6: [ 1- 0]: digital audio playback
7: [ 1- 0]: digital audio capture
8: [ 1- 2]: digital audio capture
9: [ 1- 0]: hardware dependent
10: [ 2] : control
11: [ 2- 0]: digital audio playback
12: [ 2- 0]: digital audio capture
33: : timer
$ 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
tstamp_type : MONOTONIC
period_step : 1
avail_min : 5513
period_event : 0
start_threshold : 1
stop_threshold : 22050
silence_threshold: 0
silence_size : 0
boundary : 6206523236469964800
Slave: Hardware PCM card 2 'USB PnP Sound Device' 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
tstamp_type : MONOTONIC
period_step : 1
avail_min : 5513
period_event : 0
start_threshold : 1
stop_threshold : 22050
silence_threshold: 0
silence_size : 0
boundary : 6206523236469964800
appl_ptr : 0
hw_ptr : 0
#+ | 00%^C
Aborted by signal Interrupt...
#+ | 00%
Thanks,
Rodolfo
