When mastering is performed on the audio files, the sound comes out clear and professional. It is the final stage of music production. Mastering does a world of good to the audio files. When the files are mastered, it results in clarity of sound. By putting the songs through mastering, the audio files are made clearer and more professional. The master engineer knows where to modify the song and in which way, so that the sound doesn’t come across, jarring. Mastering does what recording engineer may not be able to. The constant listening to songs may cause the recording engineer to overlook certain aspects or rather defects in the song that may need correction. The mastering engineer, on the other hand, is well versed in the intricacies of sound and can find out any problems in sound by listening to it. When there are more than one tracks in an album, mastering add uniformity to the tracks. The background sounds are made less prominent and noises are reduced. This adds a great deal of clarity to the song. Mastering is essential if the songs are to be released for commercial purposes. When the songs are played on a commercial medium, the difference between mastered and amateur songs becomes apparent. Now the mastering services are also available on the internet. online audio mastering services are not just easy to access but also highly affordable too. The quality of the online mastering services is at par with that of the attended mastering. [i]