MIDI Events can be mapped to Actions in the dedicated table at the bottom of the MIDI tab of the Preferences Dialog. For more convenient handling some of these Actions are associated with GUI elements and can directly be mapped to MIDI Events by pressing Shift while left-clicking the widget.
Such elements are:
the volume faders in the Instrument Channel Strips
the FX volume knobs in the Instrument Channel Strips
the pan rotaries in the Instrument Channel Strips
the Master Fader Strip in the Mixer
A 'Waiting for MIDI input...' popup informs you that Hydrogen is now waiting for you to press a key or turn/move a controller on your MIDI device.
![[Note]](../img/admonitions/note.svg) | Note |
|---|---|
If the element that does not support MIDI automation, a different popup will inform you. |