This question was one I also pondered over when I first started using PTE. A forum member pointed me to Acoustica MP3 Audio Mixer which I find suits me excellently. Acoustica is a shareware program and only cost £15. You can find them at www.acoustica.com. There are multiple channels, probably more than you will ever need but ut is easy to use. It allows you mix music, adjust the volume of specific tracks, fade out, crossover, you name it. You can even have silence between tracks or at the satrt and end of a slide show and its aa awful lot cheaper than Adobe Audition. Gogs