Francesco Antonio Vallotti

Francesco Antonio Vallotti (11 June 1697 – 10 January 1780) was an Italian composer, music theorist, and organist.

His theoretical endeavours would culminate in 1779 with the publishing of his 167-page, four-volume work, Della scienza teorica e pratica della moderna musica (On the scientific theory and practice of modern music), just before the end of his life.

This leads to thirds quite close to pure (compared to equal temperament) in the 'home' keys of F, C and G major and in D, A, E and B minor.

On the other hand, there were very impure Pythagorean thirds in the remote keys of B, F# and C# major and in G#, Eb, Bb and F minor.

These include: He also orchestrated 43 sacred pieces by his former master Calegari, and an Introit in 5 voices by Porta.