FlexASIO should not open the input or output stream direction if it's not used about flexasio HOT 2 CLOSED

Note that this enhancement, on its own, will not help with audio format negotiation, because FlexASIO will still attempt to open a stream in canSampleRate(), but at this point FlexASIO doesn't know which direction will be used yet. This probably means FlexASIO should stop trying to open a stream in canSampleRate() and instead should act as if any sample rate is supported; this would probably result in a net improvement to user experience, especially when using WASAPI Shared (see #23).

from flexasio.

Actually, I just thought of an even better way to solve the above problem: in canSampleRate(), try to open two streams: an input-only stream and an output-only stream. Return false only if both streams fail to open. This will still allow canSampleRate() to return mostly accurate information, in the sense that it will still accept a sample rate if there is any way to make it work.

from flexasio.