Re: New user with an ICUSBAUDIO7D

Alan and list,

On Mon, Jul 20, 2020 at 9:45 AM Alan Corey <[email protected]> wrote:

> 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.
>

Alan have you tried running "alsamixer" in a terminal window and inspecting
the settings?

>
> 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.
>

Do you have a voltmeter to watch what happens on the output of the
capacitor and ground when you tap?

>
>
> 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
>
>
> _______________________________________________
> Alsa-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/alsa-user
>


-- 
Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.

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