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Midi psr225gm help keyboard? - psr225gm midi computer

Psr225gm I have a keyboard and a USB-MIDI MAUDIO. I try to configure it so as to understand to send MIDI signals to the computer. I do not want me as a regular MIDI keyboard in FL Studio work, but I do not understand the Manua
http://www.yamaha.com/yamahavgn/Documents/KeyboardsDMI/PSR225E.pdf
If someone could help me understand what to do exactly that would be great. Thank you.