Select the appropriate MIDI device from the drop-down menu for Receive From and (optionally) Send To.Specify which MIDI channels will be used to communicate with this Instrument.This will make using your New Instrument easier. Type in a Manufacturer Name and a Device Name in the appropriate fields. In the left hand browser select New Instrument.In the External Devices menu, click on the Add button.(Mac OS X: Go to Studio One > Preferences > External Devices) and follow these steps: To set up your Instrument, navigate to Studio One > Options > External Devices. The external MIDI devices audio outputs are connected to the interface, and routed into Studio One either by hardware monitor, or via an Audio Track. Please make sure your audio interface is setup for Studio One in Studio One > Options/Preferences(OS X) Audio Setup. One thing to note, a MIDI connection alone will not allow the monitoring of audio from the external device.

Please consult the devices documentation for instructions on how to connect that device to a computer.

Make sure your external devices are connected to your computer either by MIDI cable or with a USB connection. External Instruments are set up globally and then are available for use in any Song.

In Studio One 3, an External Instrument is an external MIDI hardware synthesizer, workstation, or other device that can generate or manipulate sound.