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Optimising for mono audio

Question asked by Joe Wright on Jan 15, 2018
Latest reply on Jan 16, 2018 by Joe Wright

Hi, I'm prototyping something that processes digital mono audio from a mems mic, transferring the data over i2s into an stm32f373. The only issue I have is that the DMA transfer is designed for stereo so twice as much data is transferred than necessary, with the second channel being zeros.

 

I'm wondering if there is a more efficient design, perhaps with a different mcu, communication type, etc.., so that only the single audio channel is transferred.  As far as I can tell i2s will always give a stereo feed to the DMA.

 

Can anyone think of a mono optimised design?

 

Thanks, Joe

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