In order to produce a click, Pro Tools Free can use a sound module with proper configuration of the OMS Setup application. You have the ability to route the click from Pro Tools Free to trigger any device provided it has been defined in OMS. If you do not have any external sound modules, you still have the option to use the QuickTime Musical Instruments software synthesizer. This is a General MIDI, multitimbral sound module which is included with the Macintosh Operating System. In order to take advantage of this "virtual synthesizer," you need to enable its operation through OMS. - Launch the OMS setup application. - In the studio setup window, double click the QuickTime Musical Instrument icon and click the radio button next to the word "on". Click "Use Rock Drum Kit" checkbox . - Click the "OK" button, choose "save" from the file menu and quit OMS Setup. - In Pro Tools Free, select Click Options from the MIDI pull-down menu or double click on either the count-off or metronome button in the transport MIDI controls window. - Click and hold on the "Output" pop-up menu and select your destination device and channel. If using a General MIDI compatible synthesizer (such as QuickTime Musical Instruments) use channel 10, for this is the channel that contains all drum and non-pitched percussion sounds. - Select a note for the accented and unaccented beats via your MIDI controller or by typing in a note name with the Macintosh keyboard. - Once you have configured the parameters of the Click options window to your liking, enable the click by choosing "click" in the MIDI pull-down menu or highlighting the metronome button in the MIDI controls transport window.