playing ultrasonic while listening to music/watching videos

[Shannon]

You can use ultrasonic subliminals while listening to anything else, and they will work fine as long as:

* The other sounds are not overpowering the subliminal volume (play the ultrasonic at normal volume and you'll be fine).

* You are not using noise cancelling technology to neutralize the subliminal. For instance, playing the subliminal on speakers, while listening to music on noise cancelling headphones, with the noise cancellation turned on.

Jay, multiple audio sources don't interfere with one another in the way you're thinking they do, or we would have much more distorted hearing of multiple sources of sound simultaneously. Only a direct anti-wave will cancel out a wave, thus the noise cancellation advice above. Otherwise it works just fine.