SuperEQ

Revision as of 01:37, 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 plugin for Winamp. It was originally written by Naoki Shibata. SuperEQ uses 16383th order FIR filter with FFT algorithm. Its equalization is very precise.

Note that unlike traditional equalizers, there is very little roll-off or overlap between the bands; see the spectrum analysis images below.

The 18 SuperEQ bands cover the following frequency ranges:

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

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 (sample) 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 "Loudness.feq" Preset file

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

Audacity spectrum analysis

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.