On 05/03/2017 14:29, Don Pearce wrote:
On Sun, 5 Mar 2017 14:23:17 +0000, Arthur Quinn
wrote:

Hi,

Has anyone else encountered this odd effect. Listening to a flac file
of a jazz piano trio with the drums on the right. Suddenly the drums
are on the left, then a few seconds later they are back on the right.

The player is a Raspberry Pi with HiFiBerry DAC + Pro.

There is nothing wrong with the file which plays ok on the Mac

I suppose it could be a flac decoding error or perhaps a hardware error
with the I2S clocking.

I2S clocking error sounds right - except I2S word clock is high for one
channel, low for the other. I can't see how it could be in the I2S bus.


Arthur

I've never heard anything like that. If it is a decoding error you've
suffered an unbelievably rare error in so many numbers being wrong by
exactly the right amount to perform a 16-bit word shift without any
checksum flagging the problem.

Is it repeatable, or did it just happen the once? If it is repeatable,
perhaps you could put the file somewhere we could download it.

That is of course the big question. IMHO if it's repeatable it must be a
SW bug.

Andy