Re: [Alsa-user] PCM2707C + PCM1794A Crackle Problem

[Dario E. <al...@ka...>]

Hi Clemens,

On 09/26/2014 09:07 AM, Clemens Ladisch wrote:
> The PCM2707C datasheet says only 16-bit samples are supported.
> (And only 32/44.1/48 kHz.  And no volume for the I²S output.)

Oh wow. How could i fail-read like that. I'm sorry, and i'll have to
re-read my documentation it seems. Sorry for not doing my homework
properly!

I have re-did all the tests with the samplerates and bitrates you
stated, however to no result. The problem remains present.

> This might be a problem with the USB controller driver.  Which USB
> port are you using?  Try a 2.0 port, and/or a USB hub, if
> possible.

With my latest test just now i have also tried every combination with
every USB "hub" (Entry under a different "Bus" in lsusb -t) my system
has as well as an additional single certain/constant USB 2.0 Port with
an external and externally powered USB (2.0) hub. Again, nothing seems
to solve the Problem :(.

I have also tried different USB Ports and Samplerates/Bitrates under
Windows. All of them worked. This again leads me to think that at
least my motherboard hardware and/or IRQ/Interrupt-BIOS-settings
regarding my USB device are at least roughly okay. Or am i mistaken in
that assumption?

Thanks again for your help!
Best Regards
-Dario Ernst