Roland A-49 Owner's Manual page 18

Driver Installation
16.
Using your mouse, drag and connect the ▲ and ▼ (which represent the input/
output ports of each device) of the [A-Series Keyboard] and each [New Device]
that you added so that they are connected as shown in the figure .
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17.
Close the "MIDI Studio" window or the "Audio MIDI Setup" dialog box .
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