John Gibson

I'm having trouble understanding how to work with FFT data for display by plot~. Looking at the spectral tab of plot~.maxhelp, the data displayed are obviously wrong: the frequency components should start at 1 kHz, not 2 kHz, and the amplitudes should be decreasing, not increasing, for higher frequencies.

I guess my question is: am I mistaken, or is the help patch -- or plot~ itself -- broken?

Does anyone have an example of this working correctly?

I've tried this in v6.0.8 and v6.1.2 (in 32bit mode).

plot-spectral-weirdness

My problem is that my signal vector size was 128, but I need at least 256 to display this particular FFT.

plot~ spectral weirdness