AVR microcontroller (or development board) for audio DSP

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#1
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Hi:

I don't know if I'm posting this in the right place, if not, please forgive me.

Can anyone give me some advice on any *cheap* (less than $100) development board with a nice microcontroller with onboard ADC, DAC, and capable of doing a Fast Fourier Transform (16 or 32 bits architecture)?

I would like to make some experiments with digital signal processing. Specifically, with audio signals in realtime...

Am I asking too much? :)

Thank you in advance.

Best regards,

Andy

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Hi Andy,

It seems you want to use an AVR... but you might take a look at some other options.

Analog makes a great little DSP for Audio:

look up ADAU1701 on Analog's Web site. Look over the other ADAU series and the AD19xx series. There is a low cost dev kit for that and a all gui programming system. These are Audio only devices, but you can have some fun with them. A more series kit from TI is theTMS320VC33 Dev kit, $150. This is an older kit, without the fancy features found on the Analog DSP, but is a real DSP with all the in's and out's of DSP programming.

http://focus.ti.com/docs/toolsw/...

While this DSP is on the "not for new designs list" I would say it is the lowest cost DSP kit with real DSP coding that is offered. To work with the kit, a real parallel port will be needed.

Caleb

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Hey! The ADAU1701 looks promising... thank you so much...

But... what if I want to make something other than audio?

I'm looking for something more general :)

Thank you.

Andy

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How would and AVR32 UC3A series with an audio codec sound? I wish I had one too:) Well that might just be my next project!! I have a EVK1100 just need to and a DC with audio codec for testing... then spin a board.

Caleb

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Read the ABDAC appnote on http://atmel.com/avr32

It shows how to wire a simple amplifier on the internal DAC, sound quality is okay for mp3 playback.

Hans-Christian