Connect one end of your MIDI cable into the "MIDI Out" port on the back of your MIDI synthesizer. This will allow you to send signals from the synth to your notebook. If you do not know which port to use, look directly above the two MIDI ports on your synthesizer. You should see the words "MIDI Out" and "MIDI In".
Connect the other end of your MIDI cable into the "MIDI In" slot on your MIDI-to-USB converter cable.
Plug the USB converter cable into any free USB port on your notebook PC. To test your connectivity, open any digital audio software with MIDI capabilities, such as Logic, Cubase, GarageBand or Pro Tools, and begin sending signals by pressing notes on your synthesizer.