What microcontroller should I use for a 11kHz digital audio device, 1MB RAM, many triggers, no latancy?

Question

I'm trying to make a digital audio toy that plays back a wide variety of audio samples, at least 32 monophonic samples of up to 2 seconds at 11 kHz, with the possibility of samples being interrupted by other samples instantly at any time.

There would be at least 32 buttons/switches on the device, but no other input or output other than the audio.

I have a degree in electrical engineering, but it's been almost 15 years since I did anything with electronics, and I'm not sure which parts best serve my needs. Nothing I see has enough programmable memory to store the 512k+ digital sample data I want, so it probably needs to take external ROM. An on board D/A converter would be nice. The program will be very simple, samples are played verbatim, so a DSP is not necessary. I'm looking at Atmel 8051 products right now, but maybe there are others. A PIC chip could do the processing, but doesn't seem to have external address ROM.
Recommend a development board and EEPROM too please!

Answer 1

the 8051 would work well, motorola has a 68hcxxx chip with on-board adc/dac,both chips would need more ram glued on.

if this is for mass production these would be expensive.

try robbing the chinese chip out of an old phone answering machine. you might try "dsp groupe" website

Answer 2

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Answer 3

Are you cost consicous ? Are just for you own fun ?

Does other power consumptions concerns you ?

Your toy seems to be just straight forward. You know your ADC rate and you know your buffer size and input. Why not go with the CPLD and do it anyway you want ?

Unless you need some compression or more User interface control.



Did you check TI ? MPS430 ?