How do you set the manual sensitivity? I can easily set the auto to plus or minus three but when I click on manual the machine just makes that loud sound and I can not set the numbers higher. When I press the right button the screen says volume gain. I have tried clearing all programs but the same thing happens. I have gone to the manual on page 21 but it does not give much help. I also have one of the two books that is suppose to help, but it does not help either. Perhaps the machine is not working properly but my first guess is my poor computer skills. Thanks for your help.