ADAU1452 Eval @ 96 or 192kHz
I'm investigating the use of the ADAU1452 for a 96kHz or 192kHz project, and am wondering if the eval board would be helpful, given the (baffling) restriction that the CODEC is stuck at 48kHz that's been discussed already. I'd like to avoid the hardware modification.
Can't I just use an ASRC on the serial input and output to convert the DSP's core sample rate (say, 192kHz) to 48k, and connect to the CODEC normally? Or is there some other inherent reason this can't be done? That way I can use the straight eval board for initial testing, then connect to another eval board (maybe 1361) for 96kHz testing, with the original codec still working for testing.
Any reason this won't work?
Also, out of curiosity, in this situation, do I need to add antialiasing filters to the inputs to the ASRC? Or does the ASRC handle that?
Audio Signal Processors
adau1452
adau1452 eval board
SigmaDSP Audio Processors
asrc
sample_rate
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Hello Joe,
The eval board was designed to be low cost and really simple to use. We may fix this in a later rev. I would like to see it be a little simpler to modify.
Yes, you certainly can run the core at the higher rate and use ASRCs to communicate with the codec. That would work fine. No, you do not require antialiasing filters to do this. The ASRC will band limit the signal as it is converting the sampling rate. Obviously, you will not be able to see anything above 24kHz out of the codec but it will be good enough to get your code working and make sure it all fits in the DSP.
Dave T
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