[sdiy] A/D --> D/A conversion and audio

[Bret Truchan]

Hello!

So, I've wired up this very simple circuit and I could use a little advice.  
I am using a Atmel Mega 16 microcontroller that has A/D inputs.  I'm taking 
an audio signal directly into the A/D converter and sampling at around > 40k 
hertz.  (I think!)

I'm then outputing the results of the A/D to a D/A converter (DAC7625P), and 
from that into my mixer.

It's working to the point here I can hear the music, but there's a lot of 
digital degradation going on.  I've posted some questions to the Atmel AVR 
site and have gotten some good advice, but none that has cleaned up the 
audio.

I'm curious.  I don't have any circuitry between my audio source and my A/D 
input.  Does that mean that I'm clipping the negative voltages out of my 
source?  That seems like it could cause some distortion. :-)  This is my 
first time trying to do A/D conversion on audio!!

Thanks!!
- Bret

_________________________________________________________________
Have fun customizing MSN Messenger — learn how here!  
http://www.msnmessenger-download.com/tracking/reach_customize