spectral mappings

>> And if any of you can find any way to retune such files, fantastic.

>That'd be a challenge, retuning a .wav file! In theory, one could do an
>FFT, move the peaks, then do a reverse FFT, but I doubt the sound would
>survive intact. Does anybody know how good this kind of trick can get,
>and who, if anybody, does it?

this was the topic of my paper in the computer music journal from
january of last year called "consonance based spectral mappings" -
whether you moves the partials to make the sound more consonant or not,
the spectral mapping techniques do allow a fair bit of re-tuning
and re-timbre-ing, though there will be audible side effects
if you move the partials very far.

the article also has a CD so you can hear some of the possible
effects and side effects...

Bill Sethares

[Jay Williams:]
>>> And if any of you can find any way to retune such files, fantastic.

[JdL:]
>>That'd be a challenge, retuning a .wav file! In theory, one could do an
>>FFT, move the peaks, then do a reverse FFT, but I doubt the sound would
>>survive intact. Does anybody know how good this kind of trick can get,
>>and who, if anybody, does it?

[Bill Sethares, TD 416.1:]
>this was the topic of my paper in the computer music journal from
>january of last year called "consonance based spectral mappings" -
>whether you moves the partials to make the sound more consonant or not,
>the spectral mapping techniques do allow a fair bit of re-tuning
>and re-timbre-ing, though there will be audible side effects
>if you move the partials very far.

Bill, this is too kyool!! Do you mean to say you could retune, say,
one of Jay's tracks of Christmas music? How much CPU does that take?

>the article also has a CD so you can hear some of the possible
>effects and side effects...

Where can one get this CD?

JdL