Audio phase inversion quirk?

[Hans Petter Selasky]

Hi,

I've discovered using my qecholo tool that many USB audio devices have 
switched the polarity of the audio signal. I guess not so many people are 
checking this, but I'm one of them :-)

There is currently a quirk for switching left and right channels. Is there a 
sound stack quirk in FreeBSD for correcting the phase? This is just a matter 
of negating the samples before passing along to the application.

--HPS