This issue might have been addressed earlier but I can’t find it in the archives with a few quick searches.
It looks like jit.qt.grab’s attributes such as channels and samplerate are auto-determined when opening a device. This means that the previous values for these attributes are lost when a user sends jit.qt.grab an open message.
It took me quite a while to figure this out. If it is intentional I think it would be a good idea to mention this issue in the help files.
Quote: Jeremy Bernstein wrote on Fri, 29 December 2006 16:59
> If you look at the reference pages, you’ll see that certain values
> are marked as (default = digitizer-specific). It may not be explicit
> enough, but this is the mention.
Ah, I see. I overlooked the logical step that "digitizer-specific" means that the settings will be overwritten once you change the digitizer. Perhaps a good idea to add a short note to the reference page or help file.