Fx Audio Editor 4 Series for to mp4 - Version 4.39 With Fx Audio Editor you can visually edit, convert. play and record most sound file formats, rip CD's and save as WAV, MP2, MP3, VOX, WMA and most other popular audio formats. Add special sound effects and filters. Slow down those chipmunk voicemail files and save them so they can be played back with any standard audio player. Apply graphics equalizer to playback and recordings