rlr@pyuxn.UUCP (Rich Rosen) (07/12/84)
> The easiest way to speed something up without changing the > pitch (over small increments, anyhow) is to use something > called a variable-speed oscillator. A commonly used version > of this is a device called a "Harmonizer." It allows you to > raise or lower the pitch of a signal, and to mix tyhat pitch > in with the original signal if you wish. Check out the chorus > singing Adrian Belew does on "sleepless" from the new King Crimson > album for an example of one. In my work , I used them to create > pitch shifted "melodies" from single fragments of tape. If > you shift the pitch of the signal up too much (say, a fourth > or fifth), you get the upper harmonics to do funny things. My > engineer pals called it "munchkinizing"...prosaic, but to the > point. The original exploiters of harmonized (pitchshifted vocals) mixed with the original vocals (to form parallel vocal movement) were the Residents. Many of the "weird" vocals heard on their middle period albums ("Constantinople" from Duck Stab comes to mind) were done in this way. (Of course, their voices are weird to begin with.) Before there were pitch shifters there were frequency shifters, which actually shifted the frquencies of the tones up/down by a fixed amount. (e.g., a 100Hz tone with harmonics at 100, 200, 300, etc. shifted by 25 Hz up would have resulting partials at 125, 225, 325, etc.) Somehow THIS is easier to munge elctronically than pitch shifting (dome filters or something like that). One neat trick is not to just mix the tone/vocal back in to itself but to incorporate a short delay into the feedback loop, thus making a tone/voice seem to rise (or fall) in a very bizarre way. I have yet to try this with a pitch shifter, only because I don't have access to one (there WAS a freq. shifter in the old electronic music lab at school, but harmonizers are very expensive and I couldn't pick up my own today on my salary). -- a more wretched hive of scum and villainy: not found Rich Rosen pyuxn!rlr
forrest@ucsbcsl.UUCP ( ) (08/02/84)
I'd like to find out whatever I can about current work on doing computer-generated music printing. This includes such topics as music-specification languages, editing systems, hardcopy devices, existing programs, existing papers,... I'm not interested in methods for actually playing what is generated. Thank you, Jon Forrest UUCP: ucbvax!ucsbcsl!forrest Phone: 805-961-2602 Mail: UC Santa Barbara Physics Dept., Santa Barbara Cal. 93106
ron@brl-tgr.ARPA (Ron Natalie <ron>) (08/04/84)
I've got another method. Sit a speaker on a train coming toward you.