The Y coordinate seemed to show not the frequency, but the amplitude about pitch-tracking

[orchidas]

Thanks for using the plugin. Can you please share the voice file you are testing on? I am certain the y-axis shows the pitch plot, but it is possible that it is detecting the pitch incorrectly. I have not tested the detector on speech, but it works fine on singing samples, since the pitch does not change very rapidly.

[cddqssc]

Thank you for your reply. I checked the code carefully again. There was something wrong with some of the codes I modified. After I modified them back, everything worked well. Thank you for providing such a good plug-in.