Par DUBOIS THEODORE. Treatise of Harmony & Bass and Voices is an absolute must-have volume on harmonies by Theodore Dubois. Written in the last century (1921), this book includes the two parts of the treatise: Part 1 & Basses and Part 2 & Voices. This volume is quite complex, requires some strong theory knowledge and would be playable by upper-advanced players and professionals. It also features numerous examples. The two parts contains the following sub-sections: Part 1 & Basses: - Consonant harmonies - Dissonant harmonies - Alterations - Delays - Pedals - Appendix Part 2 & Voices: - Consonant harmonies - Dissonant harmonies - Alterations - Delays, Pedals… - Appendix/ Répertoire / Voix