Re: [PATCH 4/4] radio-si470x: Lower firmware version requirements

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 07/05/2012 03:35 PM, Antti Palosaari wrote:

<snip>

>> I believe you're doing something wrong ...
>>
>>> I compiled radio from http://git.linuxtv.org/xawtv3.git to tune and
>>  > "arecord  -r96000 -c2 -f S16_LE | aplay - " to play sound. Just
>> silent white noise is heard.
>>
>> You're not specifying which device arecord should record from so likely
>> it is taking
>> the default input of your soundcard (line/mic in), rather then recording
>> from the
>> radio device.
>
> I tried to define hw:1,0 etc. but only hw:0,0 exists.
>
>> Note the latest radio from http://git.linuxtv.org/xawtv3.git will do the
>> digital loopback of
>> the sound itself, so try things again with running arecord / aplay, if
>> you then start radio
>> and exit again (so that you can see its startup messages) you should see
>> something like this:
>>
>> "Using alsa loopback: cap: hw:1,0 (/dev/radio0), out: default"
>>
>> Note radio will automatically select the correct alsa device to record
>> from for the radio-usb-stick.
>
> For some reason I don't see that happening.

Hmm, so it seems that for some reason alsa is not working with the usb
"sound-card" part of the usb-stick. Can you try doing:

ls /dev/snd/

Before and after plugging in the device, you should get a new
PCMC?D0c device there.

Otherwise see if you can enable some debugging options for snd-usb-audio
and find out why it is not liking your device (and maybe at a quirk for
it somewhere) ? If you do end up adding a quirk please let me know
and I'll test with mine to ensure the quirck does not break working versions :)

Regards,

Hans