Wave file as frequency envelope? (Expression Evaluator)

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jpnullnvoid
Posts: 35
Joined: Tue Apr 21, 2009 1:31 pm
Location: Philadelphia, PA USA

Wave file as frequency envelope? (Expression Evaluator)

Post by jpnullnvoid »

Hello all,

It's been a while since I've used the expression evaluator(EE) and there is something I'm trying to achieve with it. Let's say I first create a wave file and use the EE to give it a value of 1, then I use the Shape Volume effect to essentially create an envelope with that file. Is it possible to use that wave file to control the frequency of a tone in the EE? I've been trying, but it's not working - I'm getting strange artifacts. I must be missing something obvious.

Here is an example expression, where "wave2(n)" is the envelope:
sin(2*pi*(f*wave2(n))*t)

Any help is greatly appreciated.

Thanks!

John

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Re: Wave file as frequency envelope? (Expression Evaluator)

Post by GoldWave Inc. »

You'll need to figure out the integral of the wave.

jpnullnvoid
Posts: 35
Joined: Tue Apr 21, 2009 1:31 pm
Location: Philadelphia, PA USA

Re: Wave file as frequency envelope? (Expression Evaluator)

Post by jpnullnvoid »

Ah, that makes sense. Guess I need to brush up on my math. LOL!

Thank you so much!

John

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