Maztr's free online Audio File Separator is a quick and easy tool you can use right in your browser, without downloading any software, to extract the audio stream from your .avi, .mov, .mp4 and .wmv video files and digital movies. No account or login is required to use it.
Our Audio File Separator also gives you the option to convert the bitrate of the audio file up or down between 64kbps and 192/320kbps.
This tool extracts the maximum quality audio available from the original source video file, subject to your output file choice. For best results, we recommend extracting audio in .wav file format.
Of course, the quality of the audio output ultimately depends on the quality of the source - the video file input. In general, video files produced with lossless compression, such as .avi and .wmv, often give a better result than video files with lossy compression, such as .mp4 and .mov.