Graduated volume change

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chrisjj
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Joined: Tue Feb 07, 2006 5:38 pm

Graduated volume change

Post by chrisjj »

Is there a /single/ effect that will set the selection volume to 400% at the start linearly grading to 100% at the end?

(I am trying to simplify a multi-effect preset.)

Thanks.
DewDude420
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Post by DewDude420 »

The only thing that would allow you do such a thing is the shape volume effect, but it only supports up to 200% amplification...however if you shaped it to go from 200% to 100% and ran the effect twice, your net effect would be what you want. You could also double the volume of the entire file and run shape volume only going from 200% down to 50%, but I don't believe you'll be able to do it with a single effect.
chrisjj
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Joined: Tue Feb 07, 2006 5:38 pm

Post by chrisjj »

Thanks for the suggestions.

> if you shaped it to go from 200% to 100% and ran the effect twice,
> your net effect would be what you want.

That's the multi-effect preset I am trying to simplify. :) Particularly because I want the start %age to be easily adjustable.

> You could also double the volume ...
> and run shape volume only going from 200% down to 50%

That would make out-of-range values in the intermediate. Is GW sure to preserve them? I cannot afford them to be clipped.
Last edited by chrisjj on Thu Jun 18, 2009 9:29 pm, edited 1 time in total.
DewDude420
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Post by DewDude420 »

Goldwave uses 32-bit floating point for temp storage and processing audio. Provided you make sure you "maximize" before saving it in a 16-bit format, the actual data will not be clipped. it'll look clipped, it might even sound clipped when you preview it, but you can knock the volume back down and it won't actually be clipped.
chrisjj
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Post by chrisjj »

> Provided you make sure you "maximize" before saving it in a 16-bit
> format, the actual data will not be clipped.

Great. It doesn't reduce the number of steps in this case, but it is good to know for the future. Thanks.
Moonmist
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Post by Moonmist »

how about going from 100% to 25%, then no maximizing required and it won't be clipping (100*4 = 400 and 25*4 = 100 so boom there's your 400% to 100% without clipping all in one step!)

Can't believe no one else thought of that! :?
chrisjj
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Post by chrisjj »

Moonmist wrote:(100*4 = 400 and 25*4 = 100 so boom there's your 400% to 100% without clipping all in one step!)
Thanks, but that's two steps. And requires start %age adjustment to be made in two places.
Moonmist
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Post by Moonmist »

chrisjj wrote:
Moonmist wrote:(100*4 = 400 and 25*4 = 100 so boom there's your 400% to 100% without clipping all in one step!)
Thanks, but that's two steps. And requires start %age adjustment to be made in two places.
No I was just telling you the math so you could see that going from 100 to 25% is the same as going from 400 to 100%... well it's one step for me when I do it I know that. Oh well, whatever at least I know what I'm talking about, maybe I don't understand what you're trying to do, NM then.
chrisjj
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Post by chrisjj »

> No I was just telling you the math

No, you said:

>> (100*4 = 400 and 25*4 = 100 so boom there's your 400% to
>> 100% without clipping all in one step!)

... which is actually 2 steps.

> well it's one step for me when I do it

Step #1 : 100*4 = 400
Step #2 : 25*4 = 100

If you have a way to do that in 1 GW step, I'd like to hear it.
Moonmist
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Post by Moonmist »

oh sorry I thought you wanted to also normalize afterward which if you did 100 to 25 you wouldn't need to normalize. I guess you actually want the signal to be 12db over clipping level then for some reason... in that case you can't do it all in one step until Chris (not you.. the developer of Goldwave) changes the code to allow up to 400% in the shape volume effect.

But if your goal was to do 400 to 100 and then normalize the volume immediately afterward then doing 100 to 25 would give you that result all in 1 step that's what I meant. Sorry for the confusion. Yeah it can't be done in one step right now, that would be nice, there's been times where I too wanted/needed to edit up to 400% and wished I could. Maybe Chris will add that one day.
chrisjj
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Post by chrisjj »

> oh sorry I thought you wanted to also normalize

I don't want to normalise. I want only the change that the OP specified.

> I guess you actually want the signal to be 12db over clipping
> level then for some reason...

No I don't. The source signal has 12dB headroom.

> in that case you can't do it all in one step until Chris
> (not you.. the developer of Goldwave) changes the code

OK, thanks for the confirmation and your suggestions.
DewDude420
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Post by DewDude420 »

Ever think about using the effect chain to chain several effects together? You could set the chain up once then apply it whenever you needed.
donrandall
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Post by donrandall »

Is GW sure to preserve them? I cannot afford them to be clipped.
Copy the original file. Close the original file. Work with the copy.
chrisjj
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Post by chrisjj »

> Copy the original file. Close the original file. Work with the copy.

Thanks, but I am batch processing, so that's not possible.
donrandall
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Post by donrandall »

> Copy the original file. Close the original file. Work with the copy.
Thanks, but I am batch processing, so that's not possible.
Okay by me. Do whatever pleases you most.

If you ever manage to wreck the only recording you have of something that is important to you -- and you discover that there is no way to replace it or repair it, you will then discover why I offered that advice.
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