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DOP not working correctly with Mixer and Volume turned off!?
Posted: Tue Sep 18, 2018 9:30 am
by SonnyDK
Hi, we have the issue that if we turn mixer and volume control off the signal get corrupted... There should be no processing on the DOP container, none the less the data stream is on DSDL and DSDR is not continuesly but like the DOP marker gets corrupted....
Any one having this issue?
Processor is XUF208 + latest USB Audio class software.
Normal PCM works BTW.
BR
Sonny
Re: DOP not working correctly with Mixer and Volume turned off!?
Posted: Tue Sep 18, 2018 11:05 am
by SonnyDK
The attached shots are with DSD direct.
scope_0.png
scope_1.png
scope_2.png
Re: DOP not working correctly with Mixer and Volume turned off!?
Posted: Tue Sep 18, 2018 11:48 am
by SonnyDK
I have investigated more.
The bit rate of the data matches the samplerate. So that is okay.
The Mixer and Volume control is ok and switched of as the DOP matches the DSD data stream.
DSD clock bit is also ok.
Only every 8. 32 bit samples get you. 11.4uSec out of 79.8uSec.
Something is missing but i cannot figure out what the issue is. It is the Stock code and the Audio.xc is only modified with "__XS2A__" defination.
Re: DOP not working correctly with Mixer and Volume turned off!?
Posted: Tue Sep 18, 2018 12:30 pm
by mon2
Hi. Not an audio developer but review this thread and especially the last post from shaw and XMOS technical support:
http://www.xcore.com/viewtopic.php?f=8& ... P&start=10
Code: Select all
http://www.xcore.com/viewtopic.php?f=8&t=6767&hilit=DOP&start=10