playing ultrasonic while listening to music/watching videos

[Shannon]

Ultrasonics played at the same time as normal audio on the same speakers should work fine, although it will place added stress on speakers to perform. You may need speakers of higher frequency response, but I have used subliminals that were both masked and ultrasonic at the same time without trouble, and I regularly use them while my laptop is playing music at the same time, also to no degradation of effect and audio quality.