In article , Jim Price
wrote:
On 20/03/13 14:23, froggy wrote:


On 06/03/13 23:31, Andy Furniss wrote:

I don't know about USB, but for others you can see what is being fed
to the h/w by doing (while playing something) -

cat /proc/asound/card0/pcm0p/sub0/hw_params

Of course the numbers may need changing to suit setup.

You now have the chance to try that out on USB.

I'm not clear what the OP actually means by 'rate' etc. The DAC Magic shows
the sample rate it is getting. It has a row of LEDs and the relevant one
lights up. And the iPlayer uses 44.1k sample rate.

The byte rate may be confusing as the USB interface may be shifting signed
intergers of the same size for both 24 and 16 bit samples from the source.
(The iPlayer is based on 16 bit samples, though.)

If he means the stream bitrate, then that won't show up at the level of the
ALSA output / transfers as the conversion to lpcm from AAC will have been
done by the browser or plugin.

Slainte,

Jim

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