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Microphone input

Altera_Forum
Honored Contributor I
814 Views

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? 

 

Thanks
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4 Replies
Altera_Forum
Honored Contributor I
58 Views

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

Altera_Forum
Honored Contributor I
58 Views

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. 

 

Thanks
Altera_Forum
Honored Contributor I
58 Views

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.

Altera_Forum
Honored Contributor I
58 Views

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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