PAN moves one sfxlib channel left or right in the stereo field. It is useful for simple positional effects, such as making a sound effect come from the left side of the screen while music remains centered.

The first argument is the channel to adjust. The second argument is the pan position. A centered value keeps the channel balanced; values to either side move that channel toward one speaker.

Calling PAN as a function returns the current pan position for the channel.