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

[Antti Palosaari <crope@iki.fi>]

On 07/05/2012 04:41 PM, Hans de Goede wrote:
> 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.

Two files appears, controlC2 and pcmC2D0c.

> 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 :)

And now I can hear the voice too using "arecord -D hw:2,0 -r96000 -c2 -f 
S16_LE | aplay -".

But loopback is still missing.

regards
Antti

-- 
http://palosaari.fi/