Am 05.04.2013 17:34, schrieb Jonas Petersen:
I am trying to capture from S/PDIF. I get a signal but the clocking is
broken somehow.
I have 'Multi Track Internal Clock' on 'ICE958 Input'.
'Word Clock Status' and 'Word Clock Sync' are 'Off'.
What happens is the following: It captures what comes in on S/PDIF but
it seems it will always use the internal clock with the setting from
'Multi Track Internal Clock Default'.
So even though 'Multi Track Internal Clock' is on 'ICE958 Input', the
setting of 'Multi Track Internal Clock Default' will clock the signal.
A 1 kHz sine wave at 48 kHz samplerate captured with 'Multi Track
Internal Clock Default' on 96 kHz will result in a 2 kHz sine. When
the sample frequency rates are matched, it will capture at correct
rate but with hiccups due to the rates not perfectly aligned.
It seems it's related to the ICE1712... I now tried the Audiophile 2496.
Same behaviour! There is no way to clock from external (S/PDIF). The
'Multi Track Internal Clock Default' setting will always override the
external clock rate and mess up the capturing.
I did tests on 2 very different systems: a) AMD with Xubuntu 12.10, b)
Intel with Ubuntu 12.10.
- Jonas
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
