AC3 Filter is a tiny and free Directshow filter, designed to decode multichannel sound in AC3 format. It is essential to improve the quality of the sound especially when we use 5.1 or 7.1 Dolby Surround system. Up-mixing any audio source to channels is possible, and filtering can be done in both multichannel and digital (SPDIF) output. Movies can be back-played with either AC3 or DTS audio tracks.
One of the biggest advantages of this this program is its comprehensive managing panel that is installed in Windows Control Panel. Even the unexperienced newbies can easily and effectively set the parameters such as sound quality, the number of sound enhancers and their configuration as well as handle an equalizer to play with low and high-pitched tones.