This paper describes a computationally efficient synthesis model
for snare drum sounds. Its parameters can be modulated at audio
rate while being played. The input to the model is an acoustic excitation signal which carries spectral information to color the output
sound. This makes it suitable for acoustic interfaces – devices
which provide excitation signal and control data simultaneously.
The presented synthesis model builds up on work done by Miller
Puckette and processes audio input from a piezoelectric microphone into a nonlinear reverberator. This paper details a strikingly
simple but novel approach on how to make use of the momentary
DC offset generated by piezoelectric microphones when pressed
to simulate the changes in drumhead tension. This technique is
especially of interest for interfaces without pressure sensing capabilities. In the design process we pursued an experimental approach rather than a purely mathematical. Implementations of the
synthesis model are provided for Pure Data and FAUST as open
source.