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From: davisonj@ecn.purdue.edu (John M Davison)
Newsgroups: comp.music
Subject: Re: Frequency shifting
Message-ID: <1990Jul25.133901.5916@ecn.purdue.edu>
Date: 25 Jul 90 13:39:01 GMT
References: <3956@rodan.acs.syr.edu> <110260001@hpcvlx.cv.hp.com>
Organization: Purdue University Engineering Computer Network
Lines: 18

In article <110260001@hpcvlx.cv.hp.com> bw@hpcvlx.cv.hp.com (Bill Wilhelmi) writes:
>For Pitch Shifting and Frequency Shifting to have any differentiation of
>meaning, severe constraints must be placed "factor".   The point is that
>according to the definition above, the value of "factor" doesn't seem
>to give enough information about whether the shift is a Pitch or Frequency
>shift.  The only difference seems to be that pitch shifts are large-scale
>frequency shifts.  But they still both modify the frequency.  Am I missing
>some big point?


	The aforementioned factor is not, as you suggest, some
function of the incoming frequency.  It is a real, positive constant.
(Of course, if the models were modified so that the "factor" is
another input, the factor could be real, positive function, including
functions of the audio input.  However, this is not central to the
operation of either frequency-modifying signal processor.)

-davisonj@en.ecn.purdue.edu