Monday, 07 February 2005 Sonar was first built to serve as an mp3 player for the author. An mp3 player that is simple and easy to use, uses very few system resources and has a nice GUI were the first aiming to this mp3 player. After several fixes and add-ons like playlist, spectrum and volume balance it was release for public. Now Sonar is able to play and add playlist in .snr file extension. It's spectrum has several options like color changing although it is on visible on all systems.