Connect a MIDI keyboard to the computer. The keyboard will automatically install any required drivers. Open a sequencing program to a blank project.
Create a new track, and choose to create a MIDI track with a virtual instrument. Select Broomstick Bass as the virtual instrument for the track.
Arm the track for recording by clicking the "Arm" or "Record" button next to the track heading in the main window. Press the large "Record" button to begin recording. Broomstick Bass will take MIDI data played from the keyboard and produce sound with it. Press the "Stop" button on the transport to stop recording.
Edit MIDI data as desired.