Haas

Audio Single output Transform

Apply Haas Stereo Enhancer.

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

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

$result = $audio->apply(new Haas(…));

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 level in
level_out	float	1	0.015625–64	set level out
side_gain	float	1	0.015625–64	set side gain
middle_source	HaasSource	mid	left, right, mid, side	set middle source
middle_phase	bool	false	—	set middle phase
left_delay	float	2.05	0–40	set left delay
left_balance	float	-1	-1–1	set left balance
left_gain	float	1	0.015625–64	set left gain
left_phase	bool	false	—	set left phase
right_delay	float	2.12	0–40	set right delay
right_balance	float	1	-1–1	set right balance
right_gain	float	1	0.015625–64	set right gain
right_phase	bool	true	—	set right phase

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