Hard Limiter

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Gale 06Dec12: @Steve, I've largely gone with your ideas, replacing "threshold" by "dB limit". I agree the latter does not limit the waveform to that level, but its description does say "If the Wet level and Residue level settings are left at default, the peak level of the result will be clipped down to this level." I think that clarifies the limit is affected by other controls.

To include a link to the Glossary entry for clipping it is essential that entry is expanded, otherwise it is too confusing. I've tried to expand that, and so included a link to it. Please review that entry. If you are happy, we can remove all the ednotes except this one. Thanks for your concern to get this correct. A wiki page about limiters and clippers might still be good.

Hard Limiter is like an extreme compressor effect, reducing the dynamic range of the audio. Where the waveform exceeds the level set in "dB limit" it is clipped down, so reducing the peak level.

Hard Limiter can also sometimes be used to remove stubborn clicks that peak well above the general level of the waveform. See the Wiki tips about using Hard Limiter for click removal and other methods.

Accessed by: Effect > Hard Limiter...
Hard Limiter dialog

To avoid excessive distortion arising from the clipping, this effect should be used in moderation. If the result sounds distorted during loud parts, try raising the "dB Limit" and/or the "Residue level".

dB limit

The amplitude level above which the input signal is processed. If the Wet level and Residue level settings are left at default, the peak level of the result will be clipped down to this level.

Wet level

The amount of the clipped signal that is fed to the output. It thus acts as a volume control for audio below the dB limit. If left at default level of 1.0, all sounds below the dB limit are fed to the output. At settings below 1.0, the volume of the result will be reduced.

Residue level

This allows a proportion of the signal that has been removed by clipping to be added back to the output. By default the value is 0.0 and so all of the clipped signal is discarded. By raising this level, some of the clipped signal will be restored, making the limit softer. More peaks and troughs of the original waveform will be retained, and the resultant volume level will be higher than that set in the dB limit.

Special effect: If you turn the Residue level full up to 1.0 and the Wet level full down to 0.0, you will hear only the pieces of waveform that are above the dB limit you choose.


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