WonderFox HD Video Converter Factory Pro is the best MKV file to MP3 converter that is highly recommended by experts and users. It can help you convert MKV video to MP3 audio with good sound quality. It also enables you to freely recode any other type of video or audio file format, such as converting FLAC to MP3, MKA to MP3, MP4 to MP3, etc. This full-featured converter MKV to MP3 can not only convert video & audio, but also allows you to edit files by cropping, cutting, merging videos, downloading music from YouTube, Facebook, Dailymotion and 1000+ sites, and more.
Below are the specific conversion steps. Please free download and install the converter for preparation.