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Altera_Forum's avatar
Altera_Forum
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17 years ago

Help with altera FFT

hello; what i want to do is to get spectrum of an sinusoidal signal using the altera fft core i have generated a v8 fft with the following setting: fft point : 64 (to start with) archi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

does your wave file sweep frequencies or is a constant tone?

maybe an FFT is overkill if you're just trying to detect presence of a 1 kHz tone.

is it possible that some of your FFT input data is silence until the wave file actually plays? that would explain why the amplitude varies below your threshold.