NAME
Peta::Synth::EQ - the master equalizer
VERSION
version 0.2610180
SYNOPSIS
my $eq = Peta::Synth::EQ->new(rate => 48000);
$eq->set(low => { gain => 3 }, high => { gain => -2, freq => 6000 });
my ($l, $r) = $eq->process(\@left, \@right);DESCRIPTION
Four bands of biquads: a low shelf, two peaking bands and a high shelf, each with a frequency, a gain of -12 to 12 dB and (peaking bands) a Q. Bands at 0 dB cost nothing.
METHODS
new
new(rate => 48000, bands => { ... }): all bands at 0 dB, then bands as for set.
set
set(low => { gain => 3 }, mid2 => { freq => 3000, q => 2 }): the bands' frequency, gain or Q, each held within its range. Returns the equalizer.
params
{ low => { freq, gain, q }, ... }: the bands as they are set.
clear
Forgets the sound so far: the filters start from silence again.
active
Whether any band is not at 0 dB.
quiet
Whether the filters have rung out (what they hold is below -200 dB).
response
The response in dB at a frequency.
process
process(\@left, \@right): the sound through the bands; fresh arrays.
FUNCTIONS
names, range
The bands' names; the range of freq, gain or q.
AUTHOR
PetaMem s.r.o. <info@petamem.com>
COPYRIGHT
Copyright (c) 2026 PetaMem s.r.o.
LICENSE
This package is free software, dual-licensed under the Artistic License 2.0 and the BSD 2-Clause License. See the LICENSE file of the distribution.