AVR-Chat

Guitar amps aint real hifi. The speakers dont get much above 3.5KHz, so I think a 20MHz AVR might do a respectable job of a 10bit 9KHz transfer table lookup function and echo chorus type effects. 


-----Original Message-----
From: syberraith <syberraith@yahoo.com>
To: AVR-Chat@yahoogroups.com
Sent: Sat, Nov 7, 2009 12:46 pm
Subject: [AVR-Chat] Looking for the Right AVR for my Project



I am designing a guitar pedal effect and need a MCU to sample the signal, 
erform 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.  
hese would take a significant number instruction cycles to perform.  
The function could also be performed with a look up table, which would require 
ignificant memory.
I would like to have a sample rate as high as possible, 200K samples per second 
ould 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 
nes 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 


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