Im new here, I recently purchased some backing track discs through ebay, srv, deep purple, and zz top, now you can tell Im older. I have 2 guitars one in standard tuning and 1 at 1/2 step down. So when I install the disc in to the side of the computer and send it to my I tune folder everything seems fine, But I can't find the proper tuning for most of the songs. right now Im using the computer for sound, but I hoping for advice on that also, do I use a mixer and speakers? if so what do you guys recommend? Thanks for the help