Audio Velocity at DVinfo.net

John Griffin · November 25th, 2008, 11:28 PM

How do I make the audio match the speed of the video? I am speeding up the clip and want the audio to have that high pitched fast sound to it.

Thanks
John

Seth Bloombaum · November 26th, 2008, 12:59 AM

Unfortunately, there is no audio velocity envelope available, so far as I know. That would be the coolest, and a nice match for keeping up with video tracks modified with a velocity envelope.

What we do have is time stretch. This can be accessed from clip properties, or by control-dragging an end of your audio. This doesn't give you the nice ramping you get with velocity envelope on the video track. Instead, you have to split the audio track, assign different playback speeds to each split segment (now a clip, or event), and if you want a velocity ramp, you have to build it out of little slices.

Giroud Francois · November 26th, 2008, 02:28 AM

you can use "amazing slowdowner" or another utility (free) (i have to check name).
amazing slowdowner use cursors in real time, so if you record what you hear, you can even make speed ramp manually.

Douglas Spotted Eagle · November 26th, 2008, 11:06 PM

Giroud, I'd be curious about the utility you mention. I have a VSO utility made for VST, but it's always been choppy, so I use the pitch bend in Sound Forge combined with a stretch. It works reasonably well, but not as nice as a true VSO

Giroud Francois · November 27th, 2008, 11:46 AM

the software is called BestPractice
BestPractice, an open-source audio time-stretching tool for Windows

November 25th, 2008, 11:28 PM	#1
John Griffin Regular Crew Join Date: Nov 2006 Location: Woodlawn Ill Posts: 61	Audio Velocity How do I make the audio match the speed of the video? I am speeding up the clip and want the audio to have that high pitched fast sound to it. Thanks John

November 26th, 2008, 11:06 PM	#4
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	Giroud, I'd be curious about the utility you mention. I have a VSO utility made for VST, but it's always been choppy, so I use the pitch bend in Sound Forge combined with a stretch. It works reasonably well, but not as nice as a true VSO __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

November 26th, 2008, 12:59 AM	#2
Seth Bloombaum Inner Circle Join Date: Sep 2003 Location: Portland, Oregon Posts: 3,420	Unfortunately, there is no audio velocity envelope available, so far as I know. That would be the coolest, and a nice match for keeping up with video tracks modified with a velocity envelope. What we do have is time stretch. This can be accessed from clip properties, or by control-dragging an end of your audio. This doesn't give you the nice ramping you get with velocity envelope on the video track. Instead, you have to split the audio track, assign different playback speeds to each split segment (now a clip, or event), and if you want a velocity ramp, you have to build it out of little slices.

November 26th, 2008, 02:28 AM	#3
Giroud Francois Inner Circle Join Date: Feb 2004 Location: switzerland Posts: 2,133	you can use "amazing slowdowner" or another utility (free) (i have to check name). amazing slowdowner use cursors in real time, so if you record what you hear, you can even make speed ramp manually.

November 27th, 2008, 11:46 AM	#5
Giroud Francois Inner Circle Join Date: Feb 2004 Location: switzerland Posts: 2,133	the software is called BestPractice BestPractice, an open-source audio time-stretching tool for Windows