Resonator Node

The Resonator Node takes an audio signal input, and creates a longer output sound from it, using an internal feedback, where eventually only the resonant frequency is audible. You can configure, and even control the resonant frequency using a control input.

Feeding it a short burst of noise creates a sound very similar to plucked string sounds, which is a synth technique known as Karplus-Strong string synthesis.


Inputs

Audio/Control Input

An audio signal to which the Resonator Node should add a trailing feedback. Feeding it a short burst of noise creates a sound very similar to plucked string sounds, which is a synth technique known as Karplus-Strong string synthesis.

While this input also technically accepts a control signal, the Resonator Node is for audible audio signals.

Resonant Frequency Control Input

A control signal to control the Resonant Frequency setting. Enable this input from settings, or by connecting to it.

Filter Frequency Control Input

A control signal to control the Filter Frequency setting. Enable this input from settings, or by connecting to it.

Feedback Control Input

A control signal to control the Feedback setting. The control signal acts as a multiplier, meaning a 0.5 value is the same as 50% when configured manually. Enable this input from settings, or by connecting to it.


Settings

Resonant Frequency

Sets the fundamental frequency of the resonance in the resulting audio feedback, in Hz. For example, if you want to produce an A4 note, the Resonant Frequency should be 440.

Filter Frequency

Cutoff frequency of the internal, 1st order lowpass filter. Lower values result in a more muted or dampened sound, as they reduce high frequencies in the feedback faster.

Feedback

Additional gain reduction to apply to the audio feedback, as a percentage. Lower values result in a shorter sound.


Outputs

Audio/Control Output

The same audio (or control) signal from Audio/Control Input, but with the added trailing feedback. The feedback eventually settles to the resonant frequency.