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Honored Contributor I
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Microphone input

I am trying to store an input sound wave on the DE2 board as a digital signal that I can analyze and make calculations with. Does anyone have any suggestions on how to do this? 

 

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Honored Contributor I
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Did you notice the DE2 demonstration projects dealing with sound input?

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Honored Contributor I
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Thanks for the reply. 

 

I did notice that there was a tutorial "karaoke machine" but it looks like this simply takes the input from the mic in and sends it to the line out.  

 

Do you know where I can find other sound input tutorials that deal with what I'm trying to do? Again, I'm trying to store the digital fingerprint of an input sound wave for signal analysis. 

 

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Honored Contributor I
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A basic building block for your design is the audio codec interface, it can be copied from the DE-2 demonstrations. You can process the data stream in realtime or store it to embedded or external memory for further processing.

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Honored Contributor I
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Should I interface between the audio codec and embedded memory directly? What format would be stored if I did it this way? 

 

One example project had a serial communication interface connected to the UART, which was added to the Nios II processor via the Avalon bus 

 

Thanks for the help. I appreciate the comments.
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