900Hz is way out of range for human speech. Now - maybe humans create some higher frequencies, but the dominant frequency you speak at is much lower. Maybe I

900Hz is way out of range for human speech. Now - maybe humans create some higher frequencies, but the dominant frequency you speak at is much lower. Maybe I can understand some 'peaks' at higher ranges ... but the 'big peak' should be at the frequency that is obviously the loudest, which is 100-200Hz. That's the range you speak at. But I also read that those are in fact the 'same frequencies' - simply at different phases. I also read that without 'windowing' (apparently an extremely complicated process) you get wierd results. I did a test with a 'pure' 300Hz tone - and I got a nice peak at 300Hz, but some other, rounded peaks at other ranges. Anyhow - I don't think I'm doing something wrong - I do think that FFT in the real world definitely has some weird artifacts that require interpretation, and they are non-obvious.