[CLAM] Fundamental frequency estimation

Yan Zhou yz114 at york.ac.uk
Wed Aug 4 17:29:42 PDT 2004

Hi all,

I met a problem while using SMSTools to do the pitchshift transformation. I loaded a 500Hz sinewave (about 1 second time) and set breakpoint to see the fundamental frequency it detects at each frame. The result is 498.204Hz,499.185Hz,499.644Hz,2976.26Hz,2991.05Hz,2991.91Hz....I've tried other sinewaves with different frequencies, and the same thing happened.It seems that it can only detect the first three frame's fundamental correctly, but then goes on weried. While I was using vocal sound instead of sinewave, it works fine. Could anyone tell me why it happens. Thanks!

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