[sdiy] FFTs on 8 to 16 channels

[ackolonges]

Hi all,

I was wondering if the group had any suggestions of chips for embedded real-time processing of many channels of audio (8, 16, more?) at 44.1khz 16bit on a single DSP chip? The largest workload would probably be carrying out realtime FFTs on all of the channels at once. I have some experience with using dsPICs for signal processing and synthesis (thanks to Eric's designs), and have done a reasonable amount of work with AVRs. I'm ordering an STM discovery board to see how I fare with that as well. 

So far the best candidate seems to be chips like the Blackfin ADSP-BF533 which can come in LQFP packages and can support up to 8 stereo I2S channels. Does anyone on the list have any experience with these chips? For a DIYer the implementation seems quite complicated, needing external flash memory etc. 

Any suggestions of methods of doing this kind of processing, or advice on the Blackfins would be greatly appreciated.


 		 	   		  
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