Purpose

Reactor listens to audio and extracts reactive signals for driving visuals and parameters: level and peak, onset and transient detection, spectral features, four energy bands, and beat tracking. The audio passes through unchanged, so you can drop it inline and tap its analysis.

Use

Wire audio into in and out onward as usual. Set the Reveal menu to view the reactive signals as named channels, then bind those channels to whatever you want to move. Set the band crossovers and the attack, release, and smoothing so the signals respond the way the visual needs.

Inputs and outputs

• Input 0: in accepts mono or stereo PCM. It is required.
• Output 0: out passes the input through unchanged.

The reactive signals are read from the operator’s Reveal surface as named channels, including: level, peak, onset, onset_strength, transient, centroid, flux, flatness, rolloff, the four energy bands sub / low / mid / high, and tempo / beat_phase.

Controls

• Fftsize: analysis window: 512, 1024, or 2048. Larger gives finer frequency detail, smaller responds faster.
• Sensitivity: how readily onsets are detected.
• Subcross, Lowcross, Highcross: crossover frequencies that set the four energy bands.
• Attack: how fast the level signals rise.
• Release: how fast they fall.
• Smoothing: smooths the reactive signals so they do not jitter.

Notes

• Reactor is an analysis tap, not an effect: it does not change the sound.
• Use Attack, Release, and Smoothing to shape how punchy or smooth the reactive signals feel.
• The four energy bands follow the crossover settings, so tune them to the material you are reacting to.

Ports

Inputs

• in row required
  audio_pcm_f32_mono_v1audio_pcm_f32_stereo_v1

Outputs

• out row
  mirror_input
• control row
  control_f32_v1
• level row
  control_f32_v1
• transient row
  control_f32_v1
• onset row
  control_f32_v1
• sub row
  control_f32_v1
• low row
  control_f32_v1
• mid row
  control_f32_v1
• high row
  control_f32_v1
• beat row
  control_f32_v1

Parameters

Fftsize (Fftsize) Menu op('reactor').par.Fftsize

Default:

1024

Options:

512, 1024, 2048

Sensitivity (Sensitivity) Float op('reactor').par.Sensitivity

Default:

0.5

Range:

0 to 1

Subcross (Subcross) Float op('reactor').par.Subcross

Default:

80

Range:

20 to 200

Lowcross (Lowcross) Float op('reactor').par.Lowcross

Default:

300

Range:

100 to 1000

Highcross (Highcross) Float op('reactor').par.Highcross

Default:

4000

Range:

1000 to 16000

Attack (Attack) Float op('reactor').par.Attack

Default:

2

Range:

0.1 to 100

Release (Release) Float op('reactor').par.Release

Default:

100

Range:

1 to 2000

Smoothing (Smoothing) Float op('reactor').par.Smoothing

Default:

0.3

Range:

0 to 0.99