Sleep quality...

[dissonance]

If you find that the subliminal makes your brain too active to sleep at night, just use it during the day instead.

If you hear a crackle or hiss when you turn up the speakers loud while playing an ultrasonic, it could mean the speakers can't handle it, or that you simply have exceeded the volume at which the speakers can operate without distortion. If it's not crackling or hissing when you use it as calibrated according to the instructions, there should not be a problem. If it only happens when you turn it up above that, chances are it's causing speaker distortion.

Also, Shannon, when I play the ultrasonic, there is a lot of crackling for about 10 seconds in the beginning, then it dies down, and it does this for 10 seconds in random times, but it seems like it happens always when I first start it up, and for some reason at the 50 minute mark often. Does this sound like it's working ok to you Shannon?

*edit* And I just tried it at a pretty comfortable, medium-low volume, and the crackling still happened for the first 10 seconds when I started it up, and then stopped.