Subliminal sound recordings are produced, in which, in addition to the use of a primary carrier such as music, two sound channels are used to supply subliminal messages to the brain. On one channel which stimulates the left cerebral hemisphere, the supplied message comprises meaningfully spoken, forward-masked, enabling affirmations delivered in canonical fashion by a male voice, a female voice and a child's voice. On the other channel, which stimulates the right cerebral hemisphere, instruction messages are recorded with backward masking (or in metacontrast) using the same voices. The three voices are recorded in canonical fashion with full echo/reverberation effect. The sound tracks are mixed using a special processor which converts sound frequencies into electric pulses and controls the synchronisation of the subliminal message in stereo with the primary carrier. The processor maintains a constant level differential between the primary carrier and the speech of the subliminal message and ensures, especially since the subliminal message is recorded in canonical fashion with full echo/reverberation effect, that nothing is lost from the message. The primary carrier should consist of continuous music without pauses and without significant differences in movement. 
Method and apparatus to produce subliminal sound recording