The problem with distorted music on hold is rarely the source music itself. Even a highly compressed MP3 is not distorted (the term "distorted" being loosely defined here.) It may be low quality or low fidelity, but it is not the objectionable distortion that one often hears while on hold. The problem is that the source piece equipment level is set way too high for the input level of the music-on-hold input of the phone system and it overdrives it to the point that it distorts. If they are both set correctly, even very limited fidelity source music will not be distorted. But please, don't set it so loud that the difference between a telephone conversation and the music on hold is so loud that I have to hold the phone a foot away from my ear while I wait for you to answer my call! Too low is much better than too loud. Most businesses don't have any idea how to set the levels themselves. They have to rely on their equipment provider to make those adjustments and that could cost them money for a service call, so they just let you suffer. Don't these people ever call in to their own businesses to hear how the phones is being answered and how calls are being handled? Either they don't or they don't care.