SleepPhones have a really low high-frequency output?

[LionKing]

Are you trying to hear the ultrasonic track?
if that's the case, you should not do that. You are not supposed to hear it.

I can hear it just fine when its calibrated with the Ocean track and played through speakers or headphones with an adequately linear frequency response. Especially if I close my eyes and click pause/play, its easy to tell when its playing and when its not. But its just a high 'beep', I can't make any sense of it. The point is that the response of SleepPhones seems to roll off sharply at the high end, requiring a very high volume setting to reach normal levels.

I think it was a suggestion for the ultrasonic, he never talked about this with the masked (at least I never read this one). The masked should be what you think is the normal listening volume (safe one) for you.

It was about the masked track, because he was talking about the volume difference between the masking track and the suggestion track. Can't find it now, though. And yes normal volume..... but at night, the level that's comfortable for me *and allows me to sleep* can be MUCH lower than what's comfortable for me during the day. Depends on the night, I'll keep it as high as I can that night. That's why I was experimenting with the ultrasonic track: its less disturbing to sleep with so I can keep the volume at normal levels, and the subliminal track volume is the same as the track volume, not 40 to 60dB below it.