Standard resonant highpass filter with 12dB/octave rolloff. Frequencies below the cutoff are attenuated; frequencies above it pass through.
In other words, this Node can be used to only keep the higher frequencies of an audio source, and attenuate/mute the rest (e.g. to create an “elevator-like music” effect).
Audio and Control lines (visualized with blue and purple, respectively) are both analogous to an analog signal. They can be used interchangeably, and, for example, an Audio output (blue) can be connected to a Control input (purple), or vice-versa.
This Node has exactly 2 samples of latency (equals ~0.0045 milliseconds at 44.1 kHz).