Sound KeyKey Properties
This command creates a new Sound track and sequence for the object selected in the Timeline. Using sound sequences, you can apply AIFF or WAV sound files to any objects. You will need to do this if you want to use Cinema 4D’s 2D and 3D sound rendering features.
If you intend to use 2D sound rendering you can adjust the volume and balance of any sound sequence by adding keys to the sound sequence (in a similar way to within video editing programs). When you add a key (Ctrl-click on the sequence as usual) a dialog will appear in which you can change the volume and balance values (see below). Once you have added a key, a black curve will appear below the sequence (when it is unfolded) to show the changing levels.