Audio Spectrum FilterΒΆ

kdenlive2304_effects-audio_spectrum_filter

Description

This effect/filter is an audio visualization effect that draws an audio spectrum on the image.

Parameters

Parameter

Value

Description

Graph type

Selection

Select the type of graph to display the levels

Fill

Switch

If checked, fills the area under the graph. Only applies to Graph type Line.

Mirror

Switch

If checked, mirrors the spectrum on the center line of the rectangle

Reverse

Switch

If checked, draws the points starting with the highest frequency

Window size

Integer

The number of samples that the FFT[1] will be performed on. If Window size is less than the number of samples in a frame, extra samples will be ignored. If Window size is more than the number of samples in a frame, samples will be buffered from previous frames to fill the window. The buffering is performed as a sliding window so that the most recent samples are always transformed.

Background Color

Picker

Defines the background color to be applied to the entire frame

Foreground color

Picker

Defines the color of the waveform

Line Thickness

Integer

Defines the thickness of the bar or line in number of pixels

Angle

Integer

Defines the rotation angle to be applied to the waveform

X / Y / W / H / Size / Opacity

Defines the X and Y coordinates, Width and Height, Size and Opacity of the rectangle in which the waveform is drawn. The icons help in lining up the rectangle.

Line Tension

Integer

Affects the amount of curve in the line interpolating between points. 0 draws a straight line between points; 100 draws very curved lines between points. Values below 0 and above 100 will cause loops in the lines. Only applies to Graph type Line.

Points

Integer

Defines the number of bands to draw in the spectrum. Each band shows up as a data point in the graph.

Low Frequency

Integer

The low end of the frequency range to be used for the graph (Hz)

High Frequency

Integer

The high end of the frequency range to be used for the graph (Hz)

Level Threshold

Integer

The minimum amplitude of sound that must occur within the frequency range to cause the value to be applied (dB)

The following selection items are available:

Graph type

Line

Bar

Note

The effect is not updated in the Project Monitor during scrubbing. You need to play back the project to see this effect.

Tip

Opacity is fixed at 100%. You control the opacity/transparency of the effect by adjusting the alpha component of the Foreground color.

Example

kdenlive2304_effects-audio_spectrum_filter_example

Example of the Audio Spectrum Filter effectΒΆ

  • Line Thickness set to 4