source file: m1398.txt Date: Tue, 28 Apr 1998 00:01:20 -0500 (CDT) Subject: RE: Orchestral-Instrument Aperiodicity From: mr88cet@texas.net (Gary Morrison) >It looks an awful lot like the true fundamental is an octave below the >period you have identified. That's not terribly likely for three reasons: 1. This note is in the lower register of the bass clarinet. It is not an overtone. The register key is not down. 2. If you look at the wave earlier in time, you see that the alternating low-high of that rough slowly starts alternating the other direction, and in about the same amount of time starts alternating the other way. There's something going on that isn't at a subharmonic frequency. 3. Once again, if it were a component at half the fundamental frequency, we would have seen the entire wave ooze up and down with that trough. >Try playing >a wind instrument without the reed and you will still get a rough idea >of the pitches you're fingering from the way your breath-noise is >amplified. Analogously, one thing I've done on my orchestral string samples is to sample and loop the sound of bowing the bridge, and then high-pass filter it out in the original sample. That way the pitch of that noise component doesn't change in pitch with the change in pitch of the tone, just as it does not on a the real instruments.