Sorry to bother you guys, but this seems to be a related thread about music playback. I have a question and i do not know whether or not i should post it here for a solution. Recently i downloaded a audio downloader named VideoGrabby as you can see (http://www.videoconverterfactory.com/tips/vdgb-yt-downloader.html). However, this software asks me to preset the parameters of sample rate and bit rate. I am totally confused what i should do. What are these 2 parameters' meaning? I just need a MP3 audio file.