William Pole 
Philosophy of Music [PDF ebook] 
Being the Substance of a Course of Lectures

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Performance of music – The art of composition Difference between this and the true theory or philosophy of music, Treatises by Hauptmann and Helmholtz, General nature of the latter work – Distinction between the physical and the musical portions, Objects and scope of the present inquiry – Its three main divisions, Contrast between physical and aesthetical principles, as influencing musical forms and rules, Erroneous ideas on the subject.