Hearing overtones on a single note?

Goggalor1990

So I bought myself an actual professional recording microphone this past week, and I was messing around, doing some lines from some of my favorite songs, and I tried out a bit of the falsetto note in Jeff Buckley's rendition of "Hallelujah". When I played back the recording, I noticed a strong, whistling overtone. I thought it could possibly have just been feedback from being too close to the mic, so I stepped back and did it again. Same thing: clear overtone. Normally I can't hear them, so I was surprised that a single note could possess such a strong overtone without any harmony to help. Not sure what I'm doing differently if anything, and I have no idea how to make overtones on purpose. Just thought it was kind of neat.

Wigs

Are you talking about the little blip around 5s or the whole thing?

Diego

Yeah I hear it. But I think your mic is just loud and is clipping.
What microphone did you get?