Audio phase inversion quirk?

Ariff Abdullah ariff at
Tue Jul 27 17:04:28 UTC 2010

On Tue, 27 Jul 2010 18:04:23 +0200
Hans Petter Selasky <hselasky at> wrote:
> 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.
How about make the driver advertise the opposite sign or endian as
supported formats?

Ariff Abdullah

... Recording in stereo is obviously too advanced
    and confusing for us idiot ***** users :P ........

... Going with the standard and orthodox
    is the death of intellect ..............
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