Treble recorder - easy to intermediate - Digital Download SKU: S9.Q15844 6 Sonatas. Composed by Johann Joachim Quantz. This edition: Sheet music. Original Music for Recorder. Downloadable. Schott Music - Digital #Q15844. Published by Schott Music - Digital (S9.Q15844). J. J. Quantz wrote his Fantasias and Caprices for his flute student Frederick the Great. The well-known recorder teacher Gudrun Heyens (Fun and Games with the Recorder) has combined the best pieces of this collection into cycles, resulting in larger units and rewarding concert pieces.