AudioLimiter

Abstract
Author	dimzon
Version	2006-03-14
Download	AudioLimiter-2006-03-14.zip
Category	Audio filters
License	Closed source
Discussion	Doom9 Forum

Description

Pupose: To increase volume for silent sounds a lot, to increase volume for middle-volume sounds a little and to keep hi-volume sounds untouched.
This must help to increase volume for speech/dialog without increasing volume for shoots, etc.

Math explained:

 for exponential:
        output = (input<0?-1:1)*(pow(10.0f, tanh( factor * log10(1 + abs(input)*9))/tanh(factor) ) - 1)/9
 for linear:
        output = tanh( factor * input) / tanh(factor)

Requirements

• [x86]: AviSynth+ or AviSynth 2.5.8 or greater
• Supported color formats: N/A

Syntax and Parameters

ExpotencialLimiter(clip, float "factor")

LinearLimiter (clip, float "factor")

WavGainLimiter(clip, float "factor")

clip   =

Input clip; audio must be float, use ConvertAudioToFloat if needed.

float  factor = 1.0

factor - proposed values are 1.0...5.0, default is 1.0

! Higher factor values increases the effect but can produce artifacts.

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ExpotencialLimiter(clip, float "curve")

clip   =

Input clip; audio must be float, use ConvertAudioToFloat if needed.

float  curve = 0.7

curve - proposed values are 0.0...1.0, default is 0.7

Examples

WavSource(...)
ConvertAudioTofloat()
Normalize()
LinearLimiter(2.0)

Changelog

Version      Date            Changes

             2006/03/14      - latest release

Archived Downloads

Version	Download	Mirror
2006-03-14	AudioLimiter-2006-03-14.zip	AudioLimiter-2006-03-14.zip

External Links

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