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Altera_Forum
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9 years ago

I get a big noise when I echo the audio data from microphone

I designed a audio system in Qsys. I read the fifo data from the microphone input and write it to the audio write fifo. Although I can hear the microphone echo, it also generate a very big noise. I c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

A simple counter that increments and is reset to zero results in a triangle wave. A counter that alternates between the min and max values gives you a square wave. Make sure a complete cycle runs in about 400-500 Hz for the most audible tone on cheap speakers.