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Altera_Forum's avatar
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

Thank you for the reply!

How can I generate a synthetic audio signal? Since I don't have the line in cable...

I try to do this, but it doesn't work... I think this two lines will generate the sound of "l_buf = 30000"?

unsigned int l_buf = 30000;

alt_up_audio_write_fifo (audio_dev, &(l_buf), 80, ALT_UP_AUDIO_LEFT);

Many Thanks