Swift AC3 Sound to WAVE Backup as the publisher gives excellent FREE after service to buyers and FREE technical support to all trial users. And all users' emails will be replied within a business day except holidays or weekends! Supported file formats WAV, MP3 (with external encoder), WMA (export only), AU, RAW and SND.Transform operations: Reverse, invert, move-up/down, move-forward/backward, inter-change channels, channel mix etc.Special Effects: Equalizer, Band Pass/Stop Filter, Noise Reduction, Echo, Reverb, Modulate, Stretch/Shrink, Change Speed.