Wouter1

ok so it seems the hf noise is really coming from your DAC then. Do you think this is a design flaw or jjust a problem with your unit?

Time's up for now, thanks for all the help so far!

There is nothing special in the plists. It just indicates number of channels, names of channels, manufacturer etc. The only things I don't know there is TransportTypeOverride, bConfigurationValue and bInterfaceNumber....

> I don't understand all the buffers and so on, and how the driver works, but I think I read somewhere that the whole thing is loosely synced to the...

They need the buffers because there are different threads on different CPUs involved. And because you don't want to handle every byte that comes in separately, the overhead costs for...

Yes there also buffers are needed. > If the USB bus could be made to run with it's packets in perfect sync with the audio clock packets then we would...

Could this be related to #46?

What do you mean with 4x rates, the 176k and 192k? I will move your comment on #46 to #46

My hunch is that this noise is coming from the DAC. There is an analog low pass filter behind the DAC. For the total picture, THD+N is also defined between...

For the AK4396, the specs use different bandwidths - they measure up to 40kHz for the 96kHz sample rate and up to 80kHz for the 192k rate. Actually, they SPECIFY...