With aSkysoft MP4 to MP3 Converter, you will be able to convert most popular video and audio file types into the Mp3 and WAV audio formats. The application supports lots of input file types, including ASF, AVI, SWF, WMV, 3GP, FLV, VCD, MP2, AIFF, MP4, MPEG and many more. Before starting the conversion process, you can set the output quality and adjust some settings such as audio codec, bit rate, sample rate and channels. The interface of this conversion tool has been designed to be user-friendly and can be easily operated even by beginners. The program comes with a media player that will let you play any of the supported formats. If you use the application to convert many files at once, you can set it to automatically shut down your computer when the job is done. Besides all the mentioned features, the program will also allow you to set the start time and duration of the files you want to convert. In conclusion, this is a great program to extract audio from your videos and it has the advantage of supporting batch conversion and providing you with many output settings to customize your conversions. The free trial version will only allow you to convert five minutes of your files or half of the file if its length is less than five minutes.