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[TLV320AIC32x4 on OMAP-L138] 1KHz Test tone frequency shifting to 988Hz

GrantHatamosa
Expert 1930 points
Other Parts Discussed in Thread: OMAP-L138

Hi,

We are seeing a problem on the audio recording generated by the TLV320AIC32x4 using a ported driver on the OMAP-L138 DVSDK 4_02_00_06

We observe that when recording a 1KHz test tone on an SD card or to a NFS folder that when it is played back the test tone is now 988Hz or around that value.

However when we redirect (i.e. arecord -f dat | aplay) the test tone back to the codec we do not see this shift behavior.

So my questions is:

> Why does storing the audio record to a storage media cause a test tone shift? And not when we redirect it?

Any insight is greatly appreciated.