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Exponential Rate of Change

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Daniel Hughes
Exponential Rate of Change
on Apr 25, 2011 at 1:54:15 pm

Hi folks.

So Vegas allows us to vary the rate of events by a maximum of 4x and a minimum 0.25x.

Pretend these are diagrams of sine waves... apologies for their abysmal quality!
I have this source audio wave:


So I can do this, 4x faster:


Or this, 4x slower:


But can I do this?


I'm looking to achieve an exponential rate increase or decrease, hoping there is some sort of way to do this in Vegas!

Thanks :)

Daniel Hughes
Amateur Writer, Director,
Director of Photography
United Kingdom


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Jeremy Rasnic
Re: Exponential Rate of Change
on Apr 25, 2011 at 2:12:09 pm

Try this: Right click the video file, choose Insert/Remove Envelope. Apply the velocity envelope to the video event. Double click the line that appears to add a node to it. Double click again further down the line and place nodes wherever you want them. Click and drag a node to ramp up or down the speed of the video.

Since I am not in front of my editing system right now, I cannot test to ensure that this will affect the audio, but I think it does.

If you do not have a video event attached to the audio, drag a video file to the timeline and ctrl select both the video and audio and then press G on your keyboard to group them.

Let us know if this worked for you.

j razz

http://www.jrazzcreations.com


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Daniel Hughes
Re: Exponential Rate of Change
on Apr 25, 2011 at 3:07:14 pm

Ah that's really cool! Unfortunately it didn't affect the audio though :(! But I think that will come in useful for something I wanted to do with a video event!

However, I did just remember a small Acoustica program I had about 4 years ago that allowed to change the velocity of audio... thanks for that Inception!

Thanks a lot for that anyway! I'll post here if I manage to do that to the audio in this little software encase anyone else needs to know.

Daniel Hughes
Amateur Writer, Director,
Director of Photography
United Kingdom


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Daniel Hughes
Re: Exponential Rate of Change
on Apr 25, 2011 at 3:32:11 pm

Yeah, anyone looking to do this with audio, download Acoustica MP3 Audio Mixer. It's shockingly simple software, but it will do this for you if you set the envelope to 'rate' :)

Daniel Hughes
Amateur Writer, Director,
Director of Photography
United Kingdom


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Omer Aydin
Re: Exponential Rate of Change
on Apr 26, 2011 at 7:24:12 am

You can do it by hand in realtime without using any 3rd party software.
Here is how;
Open a new project and load the audio as Track 1
Add a new audio track and set it to Record mode.
Add Pitch Shift Fx to track 1.
Start Recording(*)
Since Pitch Shift has no automation control, adjust the pitch by hand in realtime while recording...
Set Track 2 to solo and render it as WAV to use in your project.

Hope it helps.

*(Your audio mixer must be set to record what it playbacks.)



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Daniel Hughes
Re: Exponential Rate of Change
on Apr 26, 2011 at 3:54:03 pm

Ah yes of course!

Thanks!

Daniel Hughes
Amateur Writer, Director,
Director of Photography
United Kingdom


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