On Tue, 5 Sep 2000, Martyn Clark wrote: > 1) A signal which is not good enough for analysis (signal to noise ratio > high, recorded in an echoey environment or with reverb added, and some > clpping taking place at some stage in the process). To get quality > answers, you need quality equipment. The noise in the background looks > like a combination of general equipment noise, and left-overs from the > echo. Nothing more.
I hang my head in shame ;-) It's true - the room was very wet, my equipment is bargain-basement, and I wasn't paying attention to the gain.
> It could also be a compression effect if you are > compressing the audio at all (like recording on consumer MiniDisc).
Not compressed. At least I didn't do that :)
> I don't think that from this recording anything can be said about the > vocal tract non-linear noise generation ideas...
True, but the purpose of the clip was not to illustrate noise levels, but to demonstrate registration events in my voice... I think it is somewhat successful at this level. A trained ear can hear the changes, despite the sonic garbage, I think.
> 2) A normal countertenor arpeggio, shifting from chest into a rich > head-type resonance. The shift in resonance is accompanied by an > increase in the level of sound, which alters the visibility of the > higher harmonics (particularly in the 4 middle notes in the arpeggio).
Glad you call it "head-type resonance" instead of falsetto! I know it's just semantics, but it's nice to hear...
> 3) A relatively low level of "singer's formant" energy (measured as the > ratio of energy above 2500 to the energy below). From the recording, the > ratio is about 29% - about 10 percent below what we expect for > classically trained singers. This is going to be the case with a ligter > countertenor production, and explains why there is not much energy there > in the spectrogram.
Yikes, I didn't know that. Is the low ratio comparable to that of a lyric coloratura, who also uses a very light (though mechanically different) production? Just curious...
> Don't have time for any more comment! Sorry.
Please don't be sorry - thank you so much for writing - I learned a lot, and you've challenged me to be less sloppy. I'm just starting the MFA program in Electronic Music and Recording Technology at Mills, and I need to do better!
Tako
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