An individually tunable perfect reconstruction filterbank for banded waveguide synthesis

In gaming and other multimedia applications, there is an increasing need to simulate and transform the sounds of physical interactions with real-world objects. When these sounds are based upon source recordings, this motivates the need for flexible, yet ecologically valid resyntheses. With modal analysis as a front end, banded waveguide resynthesis enables flexible modifications to dynamic spectral content and varied forms of interaction. Unfortunately, traditional banded waveguide models using biquad filters can have problems with undesired transient behavior. To this end, we introduce a new perfect reconstruction filterbank that allows for each filter to be individually tuned to a desired mode frequency and precisely cancel the other selected frequencies. Comparisons with traditional biquad models amply demonstrate the improved transient response and overall fidelity of our model. In addition, examples of resynthesis, transformation, and alternative interaction with real-world recordings are given.