Serum features an on-screen keyboard that you can use to directly play notes using your mouse, or monitor the notes being played on an external MIDI or computer keyboard. The on-screen keyboard also indicates which notes are being played through the Serum clip player and arpeggiator.

You can also use the keyboard to specify basic settings including the following:

• TRANSPOSE — The number of semitones (positive or negative) to transpose all incoming and generated MIDI notes.
• KEY — The key to use throughout Serum, most notably in the CLIP and ARP modules.
• SCALE — The scale to use. Notes outside the scale automatically conform to the selected scale.
• SWING — Use to swing or shuffle the timing of the grid in the CLIP and ARP editors.
• OSC MAPPING — Edit the note and velocity ranges of the oscillators and arpeggiator.