SuperEQ

Revision as of 14:15, 1 September 2015

SuperEQ(clip, string filename)
SuperEQ(clip, float band1 [, float band2, ..., float band18])

Parameter:

Shibatch Super Equalizer is a graphic equalizer, originally created as a plugin for Winamp by Naoki Shibata. SuperEQ uses 16383th order FIR filters using FFT. Its equalization is very precise. Note that unlike traditional equalizers, there is very little roll-off or overlap between the bands.

Frequencies

The 18 bands cover the following frequency ranges:

(adapted from avisynth/src/audio/supereq.h)

Preset Files

SuperEQ can accept a foobar2k equalizer Preset (.feq) file. Foobar's equalizer can be found in the DSPManager, and presets are adjusted and saved from there as well.

An .feq file is a text file with a positive or negative integer on each line. No extra characters are allowed on the line. Each value controls the amplification in decibels over one frequency band. Preset files can be found in your \AviSynth25\Examples folder (Equalizer Presets.zip), or may be found by searching the Web for "foobar2000 presets."

Example 1: Apply a Preset file Loudness.feq)

SuperEq("C:\Equalizer Presets\Loudness.feq")

Contents of Loudness.feq:

4
4
4
2
-2
-2
-2
-2
-2
-2
-2
-4
-10
-7
0
3
4
4

Audacity spectrum analysis:

Band Gain Arguments

From Avisynth version 2.60, band gain arguments allow all 18 bands to be set within your script, instead of requiring a preset file. The values are specified in decibels, as integer or floating point.

Example 2: Boost midrange (speech) using band arguments

ConvertAudioToFloat
SuperEQ(
\   0,  [*    65 *]
\   0,  [*    92 *]
\   0,  [*   131 *]
\   0,  [*   185 *]
\   0,  [*   262 *]
\   0,  [*   370 *]
\   0,  [*   523 *]
\   5,  [*   740 *]
\  10,  [*  1046 *]
\  10,  [*  1480 *]
\  10,  [*  2093 *]
\   5,  [*  2960 *]
\   0,  [*  4186 *]
\   0,  [*  5920 *]
\   0,  [*  8372 *]
\   0,  [* 11839 *]
\   0   [* 16744 *]
\ )
ConvertAudioTo16bit

Audacity spectrum analysis:

Requirements

This plugin is optimized for processors which have cache equal to or greater than 128k bytes (16383*2*sizeof(float) = 128k). This plugin won't work efficiently with K6 series processors.

Changes:

Some parts of SuperEQ are:
Copyright © Naoki Shibata.

Other parts are:
Copyright © 2001-2003, Peter Pawlowski All rights reserved.