To use the sounds of your drum machine and sync it to Studio One, you will need to create a New Instrument with the MIDI 'Send To' set to your drum machines MIDI port.Please read this article for setting up External Midi Devices with Studio One 3:
Depending on the type of drum machine, you will need to set that drum machines MIDI clock to external clock and follow the steps for creating a New Instrument with sync options checked:
