A framework for the development and evaluation of graphical interpolation for synthesizer parameter mappings.

Abstract

This paper presents a framework that supports the development and evaluation of graphical interpolated parameter mapping for the purpose of sound design. These systems present the user with a graphical pane, usually two-dimensional, where synthesizer presets can be located. Moving an interpolation point cursor within the pane will then create new sounds by calculating new parameter values, based on the cursor position and the interpolation model used. The exploratory nature of these systems lends itself to sound design applications, which also have a highly exploratory character. However, populating the interpolation space with “known” preset sounds allows the parameter space to be constrained, reducing the design complexity otherwise associated with synthesizer-based sound design. An analysis of previous graphical interpolators is presented and from this a framework is formalized and tested to show its suitability for the evaluation of such systems. The framework has then been used to compare the functionality of a number of systems that have been previously implemented. This has led to a better understanding of the different sonic outputs that each can produce and highlighted areas for further investigation.