Selecting an input device is not necessary if you're answering questions using the mouse and playing sounds through your sound card. The Input driver is only needed if you're using an external MIDI device to answer questions in MUSIC LESSONS II.
This chapter explains how you set up and use sound in MUSIC LESSONS II. You can play sound through a sound card (Windows), through the computer speaker (Macintosh), or through a MIDI synthesizer (both Windows and Macintosh).