I was just reviewing the listening instructions for OPH: there were instructions for listening time, and how many days on/off, but no recommended track. Is ultrasonic preferred on this one, or is there no preference?
Edit: It is mentioned in the volume settings instructions, but not as being the recommended track. ("...headphones or ear buds are not recommended when you're using the Ultrasonic track...)
Edit: It is mentioned in the volume settings instructions, but not as being the recommended track. ("...headphones or ear buds are not recommended when you're using the Ultrasonic track...)
Emptiness is consciousness