Mapping Strategies

We propose a classification of mapping strategies into three groups:

• One-to-One Mapping : Each independent gestural output is assigned to one musical parameter, usually via a MIDI control message. This is the simplest mapping scheme, but usually the least expressive. It takes direct advantage of the MIDI controller architecture.
• Divergent Mapping : One gestural output is used to control more than one simultaneous musical parameter. Although it may initially provide a macro-level expressivity control, this approach nevertheless may prove limited when applied alone, as it does not allow access to internal (micro) features of the sound object.
• Convergent Mapping : In this case many gestures are coupled to produce one musical parameter. This scheme requires previous experience with the system in order to achieve effective control. Although harder to master, it proves far more expressive than the simpler unity mapping.

Next we discuss the wind controller and compare its features to those of an actual instrument, offering coupling strategies that may aid in regaining some of the loss of fine control due to the wind controller's non-coupled design.