Tone effect
The Tone
effect synthesizes simple audio tones to create sounds, such as
the low rumble of a submarine, a telephone ringing in the background,
sirens, or a laser blast. You can have up to five tones for each
instance of the Tone effect, to create a chord. When you apply this
effect to a layer with audio, the dry (original, unprocessed) audio
is ignored, and only the tone plays.
You
can also apply the Tone effect to a layer that has no audio, such
as a solid layer, to synthesize audio.
Note: The Tone effect doesn’t generate audio on a placeholder layer;
for the effect to generate audio, replace the placeholder with a
footage item.
- Waveform Options
- Specifies the type of waveform to use. Sine waves produce the
purest tones. Square waves produce the most distorted tones. Triangle
waves have elements of both sine waves and square waves but are
closer to sine waves. Saw waves have elements of both sine waves
and square waves but are closer to square waves.
- Frequency
- Frequency in Hz. To turn off a tone, set its frequency to
0.0.
- Level
- Changes the amplitude of all tones in this instance of the
effect. To avoid clipping and popping, use a Level value that is
no greater than 100 divided by the number of frequencies you use.
For example, if you use all five frequencies, specify 20%.
Note: To
avoid clicks at the end of a tone, set a keyframe for the desired
Level value at the frame immediately before the end of the tone,
and then set a keyframe for a Level value of 0.0 at the end of the
tone. This technique works well for any audio that you end abruptly.
