Use the Normalize utility


Use the Normalize utility in Sound Forge not the Volume utility to fix your problem.

Normalization is nothing more than changing the volume levels. The Normalize utility gives you two (2) volume readings Peak and RMS. The RMS level tells you what the basic loudness is; the Peak level tells you how much you can change things.

There are two rules that pertain to volume/normalization NEVER go over 0dB and ALWAYS normalize to the Peak levels. The closer to 0dB you are the better the signal-to-noise ratio is. For example, if you scan levels and get a Peak level of -8.6dB and a -23.4dB for the RMS level, you will know that you have 8.6dB to go before you go over 0dB and clip. Clipping cuts the tops of the spikes of the waveform and makes a loud, nasty pop when you play it back; once you clip you can never successfully rebuild the peaks. Keep in mind that when you normalize to the Peak level the RMS level also adjusts accordingly so if you normalized the Peak to 1dB from 8.6dB (an increase of 7.6dB) , the RMS level would increase from 23.4dB to 15.8dB.

As far as an actual procedure goes… The first thing you should do is run the DC Offset utility. Next step is to normalize (remember to use Peak values) in order to the get the file to the point you can work with it if needed; -6dB is a good level. Normalize each channel separately to insure that both channels are at the same level when editing begins. After you have completed your changes, renormalize both channels again at whatever peak level you want and save. As long as you keep your peak readings static for both channels and at/or below 0.10dB you should be in great shape.

Hope this helps.

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