Hi Mark, Thanks for your advice! On Thu, 2010-08-26 at 13:41 +0100, Mark Brown wrote: > On Thu, Aug 26, 2010 at 08:05:38PM +0800, Jie Jiang wrote: > > > The configuration of mx27 ssi1 transmission channel is as follows(using > > ssi api from kernel 2.6.19.2): > > This is an extremely old kernel version, the current kernel version is > 2.6.35 with 2.6.36 in development. Current mainline kernels have a > different API for configuring the IOMUX. I'd strongly recommend working > with a more current kernel if you're looking for community support. > > > Here I'm not very sure about the setting of frame rate and frame sync > > length. Is the above setting right? But even I set frame rate to 1, it > > does not make any difference. > > > What's the possible reason causing the incorrect faster playback speed? > > Any suggestion is appreciated. > > Normally this will be the result of either an incorrect frame rate or > the hardware trying to play back mono data as stereo (which will cause > data to be consumed as twice the expected rate). Yes, it seems to be this reason that causes problem. When I playback a stereo wav file(8kHz,16bit, stereo), everything goes well.But when trying to playback a mono wav (8kHz,16bit, mono)file, problem stills exist. What's the possible reason for incorrect handling of mono file? How to solve it so I can playback mono file correctly? Regards, Jie _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
