Musical Ear Prismatic silueta 11 months 3 Musical Ear Type II Prismatic silueta 11 months 0 Music silueta about 1 year 3 Music silueta about 1 year 3 Treble clef silueta about 1 year 3 Clef silueta about 1 year 1 Clef silueta about 1 year 1 Clef silueta about 1 year 2 Clef silueta about 1 year 1