Presonus Audio electronic 26x26 FireWire Recording System - Manual (Page 14)

2 Installation and Hardware Overview
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10. Expand an audio track to reveal additional buttons. One is a Stereo/Mono
switch. Do this if you are recording a stereo source like the left and right
outputs of a keyboard or other stereo sound device.
11. Finally, click the record button on the Transport Bar to begin recording.
12. Click the Help menu and Documentations. There you will find the Getting
Started and the Operation Manual for Cubase LE. Use these to further
familiarize yourself with Cubase LE.