Conclusions and Future Work

gQ packages a powerful filter in an intuitive, responsive interface. It allows the user to perform careful and accurate "sound surgery," and is useful as a learning tool for those just beginning to work with digital audio. A new version is currently being developed that will accept sounds sources from the audio inputs to the computer and that works in tandem with a spectral analysis program, bioQ, originally developed at NoTAM in Norway. Future developments will include a new window for dynamic, time-varying control of all parameters.

Acknowledgments

Much thanks to Paul Lansky, Paul Koonce, Perry Cook, Bertolt Sobolik, and Ken Steiglitz for their help in the varying stages of gQ's development.

References

[1] P.A. Regalia, S.K. Mitra, "Tunable Digital Frequency Response Equalization Filters," IEEE Trans. ASSP, vol. 35, no. 1 pp. 118-120, January 1987.

[2] U. Zölzer, T. Boltze, "Parametric Digital Filter Structures," Proceedings 97th AES Convention, Preprint #4099, 1995.