In the new year, Paul Davis wrote:
> >Sometimes it says the clock source is word clock and in () it puts no
> >signal, and sometimes it doesn't.
> 
> right. you can choose word clock, but if there's no word clock source,
> it will default back to the internal word clock source (the h/w does
> this, not the driver). 
> 
Does the driver get notified of this?

> >If I arecord card0 at 96000, card1 still shows 48000 for its sample
> >rate. 
> 
> thats correct. there is no 96kHz rate for ADAT. there is no way for
> card1 to know that card0 is operating at "double speed mode". this has
> always been a hack on all ADAT equipment: you have to explicitly tell
> (by pressing a button or running some s/w) each end of the connection
> that you're running in double speed, since at the low level, things
> have stayed exactly the same: the bits still move at 48kHz. they just
> send 1 "channel"'s worth over 2 channels.
> 
even if using word clock? RME suggests word clock can go as low as 25khz
to 105khz

>        I can then not bring the cards back to 48000 or 44100 unless I
> >unload and reload the modules--I get device or resource busy if I try to
> >switch back.
> 
> it is supposed to stop you from doing this if the card is in use,
> because it changes the channel counts and thus many other things.
> what were you using to try to change the rates?
> 
arecord, ecasound, ardour, it doesn't matter.

_J

> --p
> 
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