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Re: Help with USB audio card

Curt <curty@free.fr> writes:

> On 2017-08-11, Rodolfo Medina <rodolfo.medina@gmail.com> wrote:
>>> I did.  Besides, the USB card does not even work with headphones: when
>>> headphones are plugged into it, no sound is heard from them.
>> I had the USB work with headphones doing:
>>  $ mplayer -ao alsa:device=hw=2.0 <file>
>> Can this help to solve also the recording problem...?  I get no sound
>> recorded doing:
> The wild goose is getting further and further away.
> It's strange to record to the same device number you listened to above, but
> who knows?

$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: Generic [HD-Audio Generic], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
  Subdevices: 1/1
  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

> There's only one input device on the dongle. Have you tried recording to
> the laptop's mic with the sox command below? Does that work? Is your
> microphone busted? Are you singing loud enough (from the diaphragm)?
>>  $ sox -t alsa hw:2,0 output.wav

Yes everything.  Voice is recorded fine if the microphone is plugged into the
`mic' entry of the PC, with the command `sox -t alsa default output.wav'.  So
it is not busted.  It's not a matter of loudness either...

> ffmpeg -f alsa -i hw:2 -t 30 out.wav
> Thirty seconds.

What's this for?  ffmpeg complains:

[alsa @ 0x562c7a3dbe40] cannot set channel count to 2 (Invalid argument)
hw:2: Input/output error

> I'd open pavucontrol, select your usb audio dongle's mic as your input
> device,

How?  I see a list of three input devices:

 Monitor of Built-in Audio Analog Stereo
 Built-in Audio Analog Stereo
 CM108 Audio Controller Analog Mono

How do I choose the one I want?  Each of them has a red button with a check in
it, but nothing changes if I click on them...

> start singing (after plugging in your microphone), and see if
> you can get that input level gauge to start hopping to the tune of your
> dulcet tenor arpeggios on the upper end of the Richter scale.

Well, no, wherever I click that level does not arise...



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