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Project on Speech with DSP: Which component should be Master

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Master or Slave

HI,

I'm currently doing a project on Speech with Digital Signal Processing, whereby i need to input some of speech signal, and do some processing to eliminate the noise or echo, and output to the speaker. I am using dsPIC 33FJ 256 GP710 and Si3000 codec.

(1) Should i use DCI module with DMA or without DMA?
(2) Which of the component should play the role as Master to generate the Frame synchronisation? dsPIC33F or Si3000?

Thanks
 

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