Hello, Any ideas on how to problem solve a downloadable split track only playing the vocals...mater of fact-it's all mp3 downloads are only playing the vocals and no audio. Thank you for your help!

Most likely cause is the connection from the computer to the sound system is in Mono only, or the sound system itself is Mono only ( quite common in the classic three speakers up high pointing out to the congregation). You should plug in a pair of headphones or ear buds directly into the computer to determine if the computer actually plays a stereo signal or a mono one. If it does, check the connection between the computer to the sound board and the sound board output to the sanctuary speakers.