🎛️FilterOptions

Audio filter options types

Property	Description	Type
channelMix	This filter mixes both channels (left and right), with a configurable factor on how much each channel affects the other. With the defaults, both channels are kept independent from each other. Setting all factors to 0.5 means both channels get the same audio.	ChannelMixOptions?
distortion	Distortion effect	DistortionOptions?
equalizer	The equalizer band gains	Array<Number>?
karaoke	Uses equalization to eliminate part of a band, usually targeting vocals.	KaraokeOptions?
lowPass	Higher frequencies get suppressed, while lower frequencies pass through this filter, thus the name low pass.	LowPassOptions?
rotation	This filter simulates an audio source rotating around the listener.	RotationOptions?
timescale	Change time stretch and pitch scale	TimescaleOptions?
tremolo	Trembling effect.	TremoloOptions?
vibrato	A musical effect consisting of a regular, pulsating change of pitch. It is used to add expression to vocal and instrumental music	VibratoOptions?
volume	The volume between 0 and 500	Number?

ChannelMixOptions

Property	Description
leftToLeft	Number (optional)
leftToRight	Number (optional)
rightToLeft	Number (optional)
rightToRight	Number (optional)

DistortionOptions

Property	Description
sinOffset	Number (optional)
sinScale	Number (optional)
tanOffset	Number (optional)
tanScale	Number (optional)
cosOffset	Number (optional)
cosScale	Number (optional)
offset	Number (optional)
scale	Number (optional)

Equalizer bands reference:

There are 15 bands [0-14] 25 Hz, 40 Hz, 63 Hz, 100 Hz, 160 Hz, 250 Hz, 400 Hz, 630 Hz, 1 kHz, 1.6 kHz, 2.5 kHz, 4 kHz, 6.3 kHz, 10 kHz, 16 kHz

The meaningful range for the values is -0.25 to 0.5, -0.25 means you're completely wiping out that frequency, 0.25 means you're doubling it

KaraokeOptions

Property	Description
level	Number (optional)
monoLevel	Number (optional)
filterBand	Number (optional)
filterWidth	Number (optional)

LowPassOptions

Property	Description
smoothing	Number (optional)

RotationOptions

Property	Description
rotationHz	Number (optional) The rotation speed in Hertz

TimescaleOptions

Property	Description
speed	Number (optional) Changes the sound to play at faster or slower tempo than originally without affecting the sound pitch.
pitch	Number (optional) Changes the sound pitch or key while keeping the original tempo (speed).
rate	Number (optional) Changes both tempo and pitch together as if a vinyl disc was played at different RPM rate.

TremoloOptions

Property	Description
frequency	Number (optional) 0 < f ≤ 14
depth	Number (optional) 0 < d ≤ 1

VibratoOptions

Property	Description
frequency	Number (optional) 0 < f ≤ 14
depth	Number (optional) 0 < d ≤ 1

P.S.: Some audio filter descriptions stolen from https://github.com/natanbc/lavadsp