Manual

Key Commands

In this document, use Command (⌘) instead of Ctrl on Mac.

Key commands documented in Rack’s menu bar are not documented here.

Enter or right-click on rack: Launch the Module Browser to add modules to the rack.
F1: Open Rack manual in your browser.
F3: Show/hide CPU meter.
F11: Enter/exit fullscreen.
Ctrl+0: Set rack zoom level to 100%.
Ctrl+-: Zoom out.
Ctrl+=: Zoom in.
Scroll: Scroll rack vertically.
Shift+scroll: Scroll rack horizontally.
Ctrl+scroll: Zoom in/out.
Middle mouse button drag: Pan rack view.
Arrow keys: Pan rack view. You can use Ctrl, Shift, or Ctrl+shift to change the speed of scrolling.
Ctrl+V: Pastes a new module at the cursor position, from the module context menu “Preset > Copy” or Ctrl+C.

You must hover your mouse over a module to issue key commands for it. Key commands documented in the module context menu are not documented here.

Right click on panel: Open module context menu.
Click and drag on panel: Drag module in the rack.
Ctrl+click and drag on panel: Force-drag module. This moves other modules in order to place the dragged module.
Backspace or Delete: Delete module from the rack. You can hold this key while moving your mouse to delete multiple modules.

A parameter is any knob, slider, button, switch, or other custom component that controls a module’s state.

Click and drag vertically: Adjust value. Hold Ctrl while dragging to move the knob slowly, Ctrl+shift to move very slowly, or Shift to move quickly.
Double-click: Reset to default value.
Right-click: Open parameter context menu. You can enter an exact value into the text field, or a mathematical expression. Normal mathematical expressions like 2+2, 2*2, 1/2, and 2^2 are evaluated to numerical values immediately upon pressing Enter. You can use constants and functions below, which are case-insensitive.
- C, A#, Gb, etc: Frequencies in Hz of note names starting with middle C
- C4, A#5, Gb0, etc: Frequencies in Hz of note names with octave numbers (C4 = middle C)
- C4v, A#5v, Gb0v, etc: Voltage of notes assuming 1V/octave and C4v = 0V. Added in Rack 2.6.1.
- log2(x): Logarithm of x with base 2 Example: log2(8) = 3
- gaintodb(x): Converts a gain/amplitude factor to decibel (dB) units.
  Example: gaintodb(1) = 0, gaintodb(0.5) = -6.0206, gaintodb(0) = -inf
- dbtogain(x): Converts a decibel (dB) value to gain units.
  Example: dbtogain(20) = 10, dbtogain(0) = 1, dbtogain(-inf) = 0
- vtof(x): Converts a 1V/octave value in volts to frequency in Hz, centered at middle-C (261.63 Hz).
  Example: vtof(0) = 261.63, vtof(-1) = 130.81
- ftov(x): Converts a frequency value in Hz to 1V/octave value in volts.
  Example: ftov(440) = 0.75, ftov(c#4) == 0.083333