Hi Andrew,

No, there is no way to force the streams to be separated as long as the driver 
believes that they are operating on the same audio clock.

My question is this: why do you believe that the current mode is “inconvenient 
for the user”? What is the inconvenience?

Rhoads
IMG Audio
Apple Inc

> On Oct 7, 2017, at 3:49 PM, Andrii Zui <[email protected]> wrote:
> 
> Hi,
> 
> Since my question relates directly to USB audio stack, I decided to post here.
> 
> According to Technical Note TN2274 (USB Audio on the Mac) , AppleUSBAudio
> will combine multiple streams per engine when certain criteria is met.
> 
> It happens that the device I'm working with is meeting this criteria. However,
> this has one undesirable side effect - input and output streams now always 
> start
> and stop together, which is inconvenient for the user.
> 
> Is there a way to force AppleUSBAudio to separate input and output streams
> between different engines? I cannot change device firmware, so I'm looking for
> some other solution.
> 
> Thanks in advance,
> Andrew
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