New techniques to model reverberant instrument body responses
Henri Penttinen, Matti Karjalainen, Tuomas Paatero, Hanna Järveläinen · 2001
In this study we introduce new methods to design and realize computationally efficient models for musical instrument bodies. The methods take into account the time-frequency resolution of the human auditory system. First we present a method where the body response (or the low-frequency-part of it) is represented as a single digital filter structure which is known as a Kautz filter. Secondly we divide an instrument body response into low- and high-frequency parts and consider how to implement these sections more efficiently. The low-frequency region is modeled as separate modal resonances. The high-frequency part can be implemented as a reverb algorithm that is designed to match the target response both spectrally and by temporal decay based on auditory resolution criteria. The crossover frequency and the needed spectral and temporal accuracy is determined by formal listening tests. The methods are examined through case studies with guitar and violin responses. 1