6 copyright: Copyright (C) 2003-2011 Ushodaya Enterprises Limited
9 url: http://sox.sourceforge.net/
13 description: Process audio using a SoX effect.
15 - Some effects are stereo only, but MLT processes each channel separately.
16 - Some effects have a temporal side-effect that do not work well.
21 title: Effect name and options
23 format: effect [options]
25 If the effect name is "analysis" then it does not run any effect.
26 Instead, it analyzes the audio to determine a normalized gain level.
27 The results are put into the level, peak, and gain properties as well
28 as this effect property as the parameter to the vol effect.
30 - identifier: analysis_level
31 title: Normalization level
35 Normalize the volume to the specified amplitude.
36 The normalization may be indicated as a floating point value of the
37 relative volume with 1.0 being maximum.
38 The normalization may also be indicated as a numeric value with the
39 suffix "dB" to set the amplitude in decibels.
42 title: Signal power level (RMS)
47 title: Peak signal level
52 title: Gain to normalize
56 - identifier: use_peak
59 Use peak signal level instead of RMS (root mean square) power level to
60 compute gain for normalization.
67 - identifier: normalise
68 title: Dynamic normalization
70 This computes the gain for normalization dynamically per frame, but it
71 uses a sliding smoothing window to prevent the gain from fluctuating wildly.
72 Currently, this must be used in combination with some SoX effect.
80 title: Smoothing window size
87 - identifier: max_gain
90 With dynamic normalization, this puts a maximum limit on the amount of gain.