This invention provides a system for customizing musical instrument signal processing
enabling users to produce different tonal characteristics in created musical pieces.
In order to create such tonal characteristics, a new mathematical model of tonal
characteristics may be digitally created based on two or more initial mathematical
models of tonal characteristics. After simulating a first and second initial mathematical
models of tonal characteristics, the new mathematical model is created by interpolating
one or more coefficients of the first and second initial mathematical models. The
new mathematical model may also adjust a control parameter where the control parameter
may exist between two values. When the control parameter is the first value, the
new mathematical model is the first initial mathematical model. When the control
parameter is the second value, the new mathematical model may be the second initial
mathematical model. When the control parameter is located at a point between the
first and second values, the new mathematical model may represent a convergence
between the first and second models.