an initial recording usually on tape is prepared containing the words that will be the subliminal verbiage each statement is recorded first in a man 39 s voice then followed by the same statement in a woman 39 s voice and finally in a child 39 s voice this same statement may then be repeated or different statements interspersed each recorded in the three different voices the initial verbiage that will eventually become the subliminal message on the resulting recording is inputted using the audio mixing device shown in fig2 in the mixing device the signals from two play heads are played on a first play device referred to for convenience as deck 2 and sent through the mixer for further processing each play head is loaded with a prerecorded tape having the same verbiage one of the play heads plays the verbiage in forward play which will become for example the left channel of the resulting recording and this verbiage functions as the forward masked subliminal verbiage in the resulting recording the other play head plays the verbiage in backward mode which will become the right channel of the resulting recording and this verbiage is sent through the system for further processing in.