Re: New user with an ICUSBAUDIO7D

When I do
  arecord -f S16_LE --channels=2 --device="hw:2,0" --rate=44100  junk.wav

It doesn't complain but the recording is silence.   Something may be
turned down or off in the mixer.  Or I'm recording the wrong
subdevice.  hw:2,1 and hw:2,2 don't seem to be found.  If I amplify
(40 db) in Audacity there's not really anything there.

I'm using a bare electret cartridge with a 3.9 k resistor from 4.2
volts in from a lithium cell, and a 1 MFD coupling cap.  I'd expect to
see something when I tap on it, but nothing.


On 7/20/20, Alan Corey <[email protected]> wrote:
> Hmm, none of these are 1 channel.  I do want 2 channels but so far
> I've got 1 electret cartridge on prototype board trying to figure out
> how much amplification I need.
>
> USB Sound Device at usb-3f980000.usb-1.5, full speed : USB Audio
>
> Playback:
>   Status: Stop
>   Interface 1
>     Altset 1
>     Format: S16_LE
>     Channels: 8
>     Endpoint: 6 OUT (ADAPTIVE)
>     Rates: 44100, 48000
>   Interface 1
>     Altset 2
>     Format: S16_LE
>     Channels: 2
>     Endpoint: 6 OUT (ADAPTIVE)
>     Rates: 44100, 48000
>   Interface 1
>     Altset 3
>     Format: S16_LE
>     Channels: 4
>     Endpoint: 6 OUT (ADAPTIVE)
>     Rates: 44100, 48000
>   Interface 1
>     Altset 4
>     Format: S16_LE
>     Channels: 6
>     Endpoint: 6 OUT (ADAPTIVE)
>     Rates: 44100, 48000
>   Interface 1
>     Altset 5
>     Format: S16_LE
>     Channels: 2
>     Endpoint: 6 OUT (ADAPTIVE)
>     Rates: 96000
>
> Capture:
>   Status: Stop
>   Interface 2
>     Altset 1
>     Format: S16_LE
>     Channels: 2
>     Endpoint: 5 IN (ASYNC)
>     Rates: 44100, 48000
>
>
>
> On 7/20/20, Clemens Ladisch via Alsa-user
> <[email protected]> wrote:
>> Alan Corey wrote:
>>> arecord -f S16_LE -d 10 -r 16000 --channels=1 --device="hw:2,0"
>>> /tmp/test-mic.wav
>>> Recording WAVE '/tmp/test-mic.wav' : Signed 16 bit Little Endian, Rate
>>> 16000 Hz, Mono
>>> arecord: set_params:1345: Channels count non available
>>
>> I suspect recording always uses channels.
>> Please show the contents of /proc/asound/card2/stream0.
>>
>>
>> Regards,
>> Clemens
>>
>>
>> _______________________________________________
>> Alsa-user mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/alsa-user
>>
>
>
> --
> -------------
> No, I won't  call it "climate change", do you have a "reality problem"? -
> AB1JX
> Cities are cages built to contain excess people and keep them from
> cluttering up nature.
> Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach
>


-- 
-------------
No, I won't  call it "climate change", do you have a "reality problem"? - AB1JX
Cities are cages built to contain excess people and keep them from
cluttering up nature.
Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach  Impeach