Audiation=
"Audiation is to music what thought is to language" (Gordon,1999 p.42)
Audiation is a cognitive process by which the brain is able to give meaning to musical sounds.

Table 2. Types of Audiation 
Type 1 listening to familiar or unfamiliar music
Type 2 reading familiar or unfamiliar music
Type 3 writing familiar or unfamiliar music from dictation
Type 4 recalling and performing  familiar music from memory

Type 5 recalling and writing familiar music from memory
Type 6 creating and improvising unfamiliar music while performing or in silence
Type 7 creating and improvising unfamiliar music while reading
Type 8 creating and improvising unfamiliar music while writing
  
Table 3. Stages of Audiation 
Stage 1   momentary retention
Stage 2 imitating and audiating tonal patterns and rhythm patterns and recognizing and identifying a tonal center and macrobeats
Stage 3 establishing objective or subjective tonality and meter
Stage 4 retaining in audiation tonal patterns and rhythm patterns that have been organized
Stage 5 recalling tonal patterns and rhythm patterns organized and audiated in other pieces of music
Stage 6 anticipating and predicting tonal patterns and rhythm patterns
(www.giml.org)