On Tue, 12 Oct 2004 01:34:59 -0700, Bob Cain
wrote:



Leonid Makarovsky wrote:

I have a 2 hour WAV file that I need to make 1 second longer. I was doing
the video capture and audio was ahead of video by 1 second factor.

So I need to stretch it without losing quality. The effect should be the
same as if I played an analog cassette tape a bit slower. The reason I'm asking
is that I had never had problems with squeezing WAV file (i.e. making them
shorter). But I once tried to stretch the WAV file in GoldWave sound editor
and artifacts such as clicks and distortion were introduced in sound. Any way
to do it without artifacts? Thanks.

Time/pitch scaling has really matured in the last couple of
years years. Steinberg's Wavelab has one of the best
implementations I've encountered. Celemony is a product
made specifically for that purpose, has a lot more
capability than you probably need, is rather expensive, but
has a hell of a reputation. Adobe Audition in its latest
incarnation is also reputed to be quite good but is outside
my experience because it requires XP.

Magix, who market Samplitude, sell a less powerful version called
"Magix Studio" or something like that for around $50, it's a very
powerful app that misses a few of the high end features of Samplitude,
but the time stretch should be in there and it works very well. I
think you can download a trial version and check it out. Also there
is a good time-stretch plugin from Prosoniq called "Time Factory" that
is excellent.

Al