An MP3 file that will help you find the sound intensity for the two channels. Right speaker and left speaker.
Normally, the sound from the two channels must be the same intensity, but there may be situations in which you want to set to be heard louder in one of the speakers. All of this file can test whether one of the two speakers is damaged or you just want to know the left and right which is to position them as appropriate.
Sound is recommended for simple audio system (two speakers) and 2.1 audio systems but can be used and other audio system.
Woofer and Bass Test - Left and right channel verification – Audio Systems