In other words, we are not limited anymore to receiving musical (or other) input only through the computer keyboard and mouse, and possibly interacting with a graphical user interface (as described in the previous chapter). Now we can extend our input framework to include elaborate, multimodal instruments (i.e., instruments with various input modalities), connecting virtual (GUI) displays with MIDI pedals, and, most importantly, traditional (yet MIDI-enabled) instruments, as shown in Figure 9.1.