In FINALE, there is an option for changing audio into notation. All he would have to do is connect the electric guitar to the computer. There are cords that can connect a standard guitar cord and that of a standard CD jack; and all you would have to do is connect the output jack of the amp. to the audio input of the computer. Once this is set up, the chords he plays can be entered into notation. The only possible problems I can think of are:
- If he strums the chord too slow, it might interpret them as individual notes
- The notation might come out as a written chord (note over note) as opposed to a chord symbol
Both problems, however, are fixeable. The first can be fixed by messing around with the settings of FINALE (I'm not exactly sure how, but I know it can be done). The second can be fixed by highlighting the section of music where chord symbols are desired and chosing the chord symbol plug-in (located in the plug-in menu).
Hope this helps.