Sound Modifier
Updated: 21 Aug 2025
Generates a modifier value based on the waveform of an audio source.
Sound Modifier
Method #
This node outputs a modifier value based on amplitude if of of an audio file or a live captured audio input. The audio is split into a series of frequency bands, and the modifier can be set to respond to the amplitude of a specific frequency band, or the amplitude of the whole waveform.
Each increasing band corresponds to a doubling of the band’s center frequency.
The output is a numeric value that can be further processed with other modifiers, or directly connected to a parameter in another node, using the operation method selected.
This node can receive sound from a Sound Capture or Sound Loader node.
Parameters
These properties control the core behaviours of the node.
Parameter Details Current Value
Shows the current value of the effect. Cannot be directly changed.
Blend Amount
The amount to blend the input modifier’s value with it’s new value.
Sound
Sound file used for the modifier. This can be overwritten with the sound input pin.
Looping
Controls whether the sound loops across timeline loops or resets. Only functions if a sound is selected within this node and a sound source isn’t connected to the Sound input.
Operation
The operation to be performed on the targeted parameter.
- Add : Adds to the parameter value.
- Subtract : Subtracts from the parameter value.
- Multiply : Multiplies the parameter value.
- Replace : Replaces the parameter value.
Restore Values
Toggle whether the values restore to 0. If unchecked, generated values incrementally add to the modifier value.
Channel
Determines whether the modifier will respond to the left, right, or stereo channels of the incoming sound
Band EQ
Selects and weights the frequency bands to be used from the sound file.
Frequency Band
Sets the Band EQ to a given band. Bands will double in frequency going upwards.
Time Offset
Offsets the time the value is modified from the time the waveform is played.
Change Threshold
Changes the threshold for what counts toward the modifier.
Attack
Controls the initial time between the current value to the peak.
Decay
Controls the time between the peak to the sustain level.
Min Value
Acts as a minimum threshold for extracting a range of values from the audio feed.
Max Value
Acts as a maximum threshold for extracting a range of values from the audio feed.
Max Clamp
Clamps the result.
Spikiness
You can use this property limit the rate of change of the output value. A value of 1 will apply no smoothing, a value of 0 will apply maximum smoothing.
Scale
Adjust the scale/range of the modifier.
Offset
Offset the waveform.
Smoothness
Adjust the amount of smoothing to applied to the output value.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Current Value | Shows the current value of the effect. Cannot be directly changed. |
| Blend Amount | The amount to blend the input modifier’s value with it’s new value. |
| Sound | Sound file used for the modifier. This can be overwritten with the sound input pin. |
| Looping | Controls whether the sound loops across timeline loops or resets. Only functions if a sound is selected within this node and a sound source isn’t connected to the Sound input. |
| Operation |
The operation to be performed on the targeted parameter.
|
| Restore Values | Toggle whether the values restore to 0. If unchecked, generated values incrementally add to the modifier value. |
| Channel | Determines whether the modifier will respond to the left, right, or stereo channels of the incoming sound |
| Band EQ | Selects and weights the frequency bands to be used from the sound file. |
| Frequency Band | Sets the Band EQ to a given band. Bands will double in frequency going upwards. |
| Time Offset | Offsets the time the value is modified from the time the waveform is played. |
| Change Threshold | Changes the threshold for what counts toward the modifier. |
| Attack | Controls the initial time between the current value to the peak. |
| Decay | Controls the time between the peak to the sustain level. |
| Min Value | Acts as a minimum threshold for extracting a range of values from the audio feed. |
| Max Value | Acts as a maximum threshold for extracting a range of values from the audio feed. |
| Max Clamp | Clamps the result. |
| Spikiness | You can use this property limit the rate of change of the output value. A value of 1 will apply no smoothing, a value of 0 will apply maximum smoothing. |
| Scale | Adjust the scale/range of the modifier. |
| Offset | Offset the waveform. |
| Smoothness | Adjust the amount of smoothing to applied to the output value. |
| Name | Description | Typical Input |
|---|---|---|
| Sound | Use the waveform from a given Play Sound or Sound Capture node. | Play Sound |