RTim

Your thread question is not as simple as you recently restated it.

IF you are going to do....My motives for asking the original question has to do with the project/CD I am working on at present. I am going to record a large proportion of a particular singers collected repertoise, and there are also going to be instrumental versions of the some of his other songs interleaving the unaccompanied vocals.

KEY is VITAL!!!!

......Unless this a YouTube re-mix....then anything ... who cares... "the masses are asses."

Hystograms can be used in photography, music, art, medical spectography - catscans - FBI/NSA internet profiles - etc.

For a musical analogy: 1.You take a "finger-print" of the vocal
2.You take the instrumental (any)
3.Using the vocalist you "morph" the instrumental to fit

For free usage - checkout "Garage Band"...it is simple and neat and best of all free. Expect about a 20 hour "learning curve."

Sincerely,
Gargoyle

Mr. Joe Offer they are offering VERY attractive RE-signing bonuses....you may want to grab a lucrative two year before a change in the administration.