Professional Orchestration's Orchestral Sketchbook is a companion to the multi-volume Professional Orchestration textbook series, which is a massive revision of the original Rimsky-Korsakov's Principles of Orchestration. Modeled after music papers used in film-scoring in Los Angeles, printed on heavy 50lb weight white paper. Organized top-down for PiccoloFlute, OboeEnglish Horn, Clarinet, BassoonBass Clarinet, French Horns, Trumpets, TrombonesTuba, Timpani, Percussion, grand staff for Keyboards, Harp or Vocals, Violins I, Violins II, Violas, Cellos, Basses. Can be used for score analysis or direct composition. Pre-ruled version also available.