Superequalizer

Audio Single output Transform

Apply 18 band equalization filter.

FFmpeg filter: superequalizer — the official reference.

Add it to a graph. The explicit form works for every filter — bind it to its input and read the result from outputs():

$node   = $audio->addFilter(new Superequalizer(…));
$result = $node->outputs()[0];

Shorthand. Single-output filters can skip the node — apply() returns the result stream directly:

$result = $audio->apply(new Superequalizer(…));

When to use it

TODO — when this filter shines: what it’s the right tool for, what to reach for instead when it isn’t, and how it composes with neighbouring filters.

How to use it

TODO — prose: how the filter actually works and what its key parameters mean (the explanation FFmpeg’s terse option help omits).

Examples

TODO — runnable PHP, with the equivalent ffmpeg CLI alongside.

Gotchas

TODO

See also

TODO

Parameters

Parameter	Type	Default	Range / values	Description
_1b	float	1	0–20	set 65Hz band gain
_2b	float	1	0–20	set 92Hz band gain
_3b	float	1	0–20	set 131Hz band gain
_4b	float	1	0–20	set 185Hz band gain
_5b	float	1	0–20	set 262Hz band gain
_6b	float	1	0–20	set 370Hz band gain
_7b	float	1	0–20	set 523Hz band gain
_8b	float	1	0–20	set 740Hz band gain
_9b	float	1	0–20	set 1047Hz band gain
_10b	float	1	0–20	set 1480Hz band gain
_11b	float	1	0–20	set 2093Hz band gain
_12b	float	1	0–20	set 2960Hz band gain
_13b	float	1	0–20	set 4186Hz band gain
_14b	float	1	0–20	set 5920Hz band gain
_15b	float	1	0–20	set 8372Hz band gain
_16b	float	1	0–20	set 11840Hz band gain
_17b	float	1	0–20	set 16744Hz band gain
_18b	float	1	0–20	set 20000Hz band gain

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Maps to FFmpeg’s superequalizer filter. Verified against ffmpeg n7.1.1.