Filters.Tremolo

overview

^{as of: 1.0.0}

the STIR Tremolo filter applies a Low Frequency Oscillator (LFO) to the channel of choice. it is recommended to apply this to a channel affected by a STIR Lowpass.

an LFO will oscillate the volume of an input audio stream at a consistent rate. in graphs, this is the equivalent of a standard Sine wave, where depth is the amplitude and rate is the wavelength.

in audio, this is applied to a low-frequency audio stream to emulate physical vibrations of a subwoofer speaker and reflection from the surrounding environment.

hhsprings' ffmpeg examples contains a visualization.

config

^{as of: 1.2.0}

Rate controls the speed at which oscillation occurs. higher values oscillate faster.

Depth controls the intensity of the volume modulation from the oscillation. the volume of the input audio will be reduced during oscillation by a maximum defined by this value.

Wet Mix controls the intensity of the tremolo signal to be mixed into the output.

Dry Mix controls the intensity of the original signal to be mixed into the output.