Emagic Logic fun User Manual page 37

MIDI Installation
keyboards. This in effect is a simple integrated MIDI interface,
with one MIDI In, and one MIDI Out for the computer. An
instrument with a "To Host" interface is controlled directly;
the MIDI In and Out serve as MIDI connections for the
computer, to allow further instruments, such as another
keyboard to be connected. This proves very cost-effective for
entry level setups, which may include only one keyboard and
another sound module. The expense of a dedicated computer
MIDI interface, or card is not initially required.
If you are working with such a module, first install the driver
software supplied by the manufacturer.
Connect the keyboard's MIDI Out to the sound module's
MIDI In, and the module's MIDI Out to the keyboard's MIDI
In (assuming it can generate sounds). Connect the "To Host"
interface to the computer, usually to a serial port.
User Guide
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