Apsyclip

Audio Single output Transform

Audio Psychoacoustic Clipper.

FFmpeg filter: apsyclip — 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 Apsyclip(…));
$result = $node->outputs()[0];

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

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

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
level_in	float	1	0.015625–64	set input level
level_out	float	1	0.015625–64	set output level
clip	float	1	0.015625–1	set clip level
diff	bool	false	—	enable difference
adaptive	float	0.5	0–1	set adaptive distortion
iterations	int	10	1–20	set iterations
level	bool	false	—	set auto level

---

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