I need a test tone disc that will allow me to play test tones from 20Hz to 100Hz in no more than 5Hz increments. I need this so I can properly set up the PEQ on my sub. I have the AVIA DVD, but I could not find this option anywhere on it. If you can do what I need to do with the AVIA DVD, please let me know where it can be found. If not, does anyone know a good cheap test tone DVD that can be bought and where? Thanks!