AVR-Chat

I am designing a guitar pedal effect and need a MCU to sample the signal, perform a non-linear function, then generate a control current.

The project requires one ADC and one DAC these can be separate devices.  

The non-linear function can be performed without a FPU using CORDIC routines.  These would take a significant number instruction cycles to perform.  

The function could also be performed with a look up table, which would require significant memory.

I would like to have a sample rate as high as possible, 200K samples per second would be the highest desired, with 46K being the absolute lowest required.  

I have been looking at 16 bit devices in the 30 MIPS range and up.  Most of the ones I have seen with sufficient speed have been excessive elaborate.

So, does anybody know on a simple device with enough speed for my project?

Regards,

Fred