From: utzoo!decvax!harpo!npoiv!hou5f!hou5b!hou5c!hou5e!hou5a!hou5d!houxz!ihnp4!ixn5c!inuxc!pur-ee!uiucdcs!uicsovax!zucca
Newsgroups: net.audio
Title: Re: Audio Frequency Shifter - (nf)
Article-I.D.: uiucdcs.1727
Posted: Sat Mar 19 22:32:52 1983
Received: Wed Mar 23 06:36:07 1983

#R:houxq:-32600:uicsovax:18500001:000:746
uicsovax!zucca    Mar 19 12:26:00 1983



   The results of such a frequency shift may result in a totally different
sound. If there is a linear constant shift of the frequency band then the
harmonic relation between the individual spectral components will be lost.

   For example if there is a harmonic at 100 Hz and then a another harmonic
at 300 Hz then a 10 Hz shift will shift the harmonics to 110,310 Hz respectivelyand the since the ratio now is < 3 between the two frequencies then they are not
related harmonically anymore, and will probably cause some kind of a 'beat'
waveform. This can be avoided if somehow the frequencies are all multiplied
by some arbitrary constant and in this way harmonic content is preserved.




			at U of I    

				   Tony Zuccarino