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Sample Rate Converter delay

Question asked by daniloz on Nov 24, 2009
Latest reply on Dec 9, 2009 by Mitesh

Hi All,

 

I'm using a SHARC ADSP-21369 and I have an audio signal at Fs_In=216kHz, stereo, which I'm converting to Fs_Out=192kHz using the internal SRC of the DSP. I am using ONLY ONE SRC in stereo mode to convert both channels, so I'd expect no delay between channels.

 

HOWEVER, I am seeing a group delay of about 0.59us from one channel to the other, which translates into a different phase shift for different frequencies, which is giving me quite a headache.

 

I've already checked the signal up to the DSP input and the channels have absolutely no delay.

 

Any ideas of what could be the problem????

 

Thank you in advance,

Danilo

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