1. A method of customizing a library of data related to acoustic signals configured to alter neural firing times in a brain, the method comprising: retrieving data related to a first acoustic signal from a memory; projecting a first acoustic signal into the brain using the data related to a first acoustic signal, the first acoustic signal configured to affect a neural firing time at a first neural location in the brain; storing a user sensory response with the data related to the first acoustic signal in the memory; retrieving data related to a second acoustic signal from the memory; projecting a second acoustic signal in the brain using the data related to the second acoustic signal; and storing a user sensory response with the data related to the second acoustic signal in the memory.