QUACK Sound Effects Studio - Version 4.0.1 QUACK allows you to generate your own sound effect WAV files by combining elements such as oscillators, filters, envelopes, and even existing WAV amples. You can produce an unlimited variety of different sound effects and use them for multimedia, games or even your web site! QUACK has an easy to use visual editor which allows you to test your sounds from within the program. QUACK creates WAV files which are compatible with all major Win95 sound applications.