Gain slider versus amplify effect

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Longtrack
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Gain slider versus amplify effect

Post by Longtrack » Sun Jan 22, 2012 4:09 pm

Just curious if the technology applied by the gain slider is in principle the same as applying permanent amplification with Amplify form the Effect menu. Is it?

steve
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Re: Gain slider versus amplify effect

Post by steve » Sun Jan 22, 2012 5:11 pm

They are slightly different.

When you apply the "Amplify" (or "Normalize") effect, the audio data is changed there and then.
When using the Gain slider, there is no change to the actual audio data at that time. Audacity is just instructed to scale (amplify) the data during playback, mixing or export.
This is why the Gain slider acts immediately whereas the Amplify and Normalize effects take some time to process.
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PGA
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Re: Gain slider versus amplify effect

Post by PGA » Sun Jan 22, 2012 5:28 pm

I suspect that Longtrack was trying to find out whether there would be any audible difference between the two controls as a result of their technology differences. The Gain control obviously affects all parts to the same degree. Does Amplify do the same or does it alter some parts of the sound differently to other parts?

steve
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Re: Gain slider versus amplify effect

Post by steve » Sun Jan 22, 2012 5:47 pm

PGA wrote:Does Amplify do the same or does it alter some parts of the sound differently to other parts?
The Amplify effect changes all of the selected audio by the same degree. The Selection may be a full track, part of a track, or even multiple tracks.
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