[linux-audio-dev] XITEL INPORT

[Charles A. Crayne]

On Wed, 30 Mar 2005 12:55:31 +0200 (METDST)
Clemens Ladisch <clemens at ladisch.de> wrote:

:Record from device "hw:1" or "plughw:1".  See
:/proc/asound/card1/stream0 for a list of supported sample formats.

Thank you for the help, but it appears that I am still missing something.
Entering "arecord -d 5 -f cd -t wav -D hw:1 test1.wav" creates a file
containing 10 seconds of silence (i.e. constant amplitude at zero
frequency).

Here is some diagnostic output associated with the recording attempt:

arecord -d 5 -f cd -t wav -D hw:1 test1.wav -v -v

Recording WAVE 'test1.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo Hardware PCM card 1 'USB Audio' device 0 subdevice 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  : 16384
period_size  : 4096
period_time  : 92879
tick_time    : 1000
tstamp_mode  : NONE
period_step  : 1
sleep_min    : 0
avail_min    : 4096
xfer_align   : 4096
start_threshold  : 1
stop_threshold   : 16384
silence_threshold: 0
silence_size : 0
boundary     : 1073741824
Max peak (8192 samples): 00041 (0x0029) #                    0%
Max peak (8192 samples): 00041 (0x0029) #                    0%
Max peak (8192 samples): 00041 (0x0029) #                    0%
Max peak (8192 samples): 00041 (0x0029) #                    0%
Max peak (8192 samples): 00041 (0x0029) #                    0%
  . . .

cat /proc/asound/card1/stream0

USB Audio at usb-0000:00:11.0-1, full speed : USB Audio

Playback:
  Interface 1
    Altset 1
    Format: S16_LE
    Channels: 2
    Endpoint: 1 OUT (ADAPTIVE)
    Rates: 48000

Capture:
  Status: Running
    Interface = 2
    Altset = 1
    URBs = 5 [ 4 4 4 4 4 ]
    Packet Size = 200
    Momentary freq = 44100 Hz
  Interface 2
    Altset 1
    Format: S16_LE
    Channels: 2
    Endpoint: 2 IN (ASYNC)
    Rates: 48000, 44100

ll /dev/snd
total 0
crw-------  1 chuck root 116,  0 Mar 25 18:15 controlC0
crw-------  1 chuck root 116, 32 Mar 30 18:49 controlC1
crw-------  1 chuck root 116,  4 Mar 25 18:15 hwC0D0
crw-------  1 chuck root 116,  8 Mar 25 18:15 midiC0D0
crw-------  1 chuck root 116, 24 Mar 25 18:15 pcmC0D0c
crw-------  1 chuck root 116, 16 Mar 25 18:15 pcmC0D0p
crw-------  1 chuck root 116, 56 Mar 30 18:49 pcmC1D0c
crw-------  1 chuck root 116, 48 Mar 30 18:49 pcmC1D0p
crw-------  1 chuck root 116, 33 Mar 25 18:15 timer