Next, click on Configure Encoder to change the settings for the LAME MP3 encoder. By default, it's going to be set to Standard, Fast . which doesn't give you a very high quality MP3 file. This is true almost all of the time. The only time it might make sense is if you have a lower bitrate audio file in a high quality format like WAV. For example, it might make sense to convert a 96 kbps WAV file to MP3, but only if you choose a bitrate of 192 kbps or higher. The higher bitrate on the MP3 file will allow it to maintain the same quality as the WAV file, even though it is a lower bitrate. Combine AC3 song online free Recommended Reading: http://www.magicaudiotools.com/ac3-merger or oil freeware ac3 merger serious