Elements of Music 
Three Mozart string quartets
Two violins, viola, and cello
Short melodic phrases are interwoven with each member having a voice
Complex rhythms with arrhythmic symmetry
Overtones quality of strings are most similar to human voice and provide powerful emotion expression within music
Used later in a listening program when sensory modulation issues have improved
 
Clinical Applications 
Refinement of attention
Refinement of academics and pragmatics
Refinement of modulation
Enhances auditory discrimination in complex environments