> Date: Fri, 10 Jul 2009 10:29:24 +0100 > <snip...> > > On Thu, Jul 09, 2009 at 03:27:17PM -0600, Louis Lee wrote: > > > However, when recording using the exact same setup for the data > > interface I am not getting favorable results. For instance, if I > > record for 5 seconds I get output in a file for 10 seconds of audio > > (arecord or sox). This results in my recording being stretched. I > > change the DAI to stereo capture and record two channels and the > > recorded output comes back correctly (5 seconds recorded is 5 > > seconds). > > This suggests that either the CODEC is configured to run at twice the > expected sample rate or that there are enough bit clocks being generated > for stereo data and the CPU DAI is trying to record data for each bit > clock cycle. Is the CPU or the CODEC the clock master in your system? > Mark, thanks again for your insights. I believe the sample rate is correct.I can see it on the scope and FRAME frequency is equivalent to thesample rate. I ran into a bit of a problem though. If you are right aboutthat each bit in the clock cycle is being recorded I think I have just enoughbits in my clock for stereo data. If I reduce it though I run into theproblem where I don't have enough bits to clock through all my data. :( This probably seems like a complete noob question. How exactly do I modify the CPU DAI to not account for each bit in the clock cycle? The CODEC is the clock master in my system. Thanks Mark! You have been tremendous help. > > I'm stuck now. From my understanding the clocks are setup the same > > way for both playback and capture. Has anyone ran into this problem > > before? The WM8974 is a mono codec so I should not have to set the > > DAI to stereo in order to capture data properly. > > It should be possible to do what you want, yes. _________________________________________________________________ Attention all humans. We are your photos. Free us. http://go.microsoft.com/?linkid=9666047 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
