Claudio is one who advocates Vallotti for Bach for certain application. But the recipe was not published until 1779. So I wondered if it is appropriate, particularly with my current question relating to performing BWV 988.
Vallotti’s description of his temperament appears in book 2 of his treatise, Della scienza teorica e pratica della moderna musica (On the theoretical and practical science of modern music). Although Vallotti stated that he had developed his theoretical system—presumably including the details of his temperament—by 1728, the first book of his treatise was not published until 1779, the year before he died. At the time of his death, the other three books had not been published, and remained only in manuscript form until an edition of all four books was published in 1950, under the title Trattato della moderna musica (Treatise on modern music).
Sure enough, consulting Claudio’s UT book, he lays out good reasons why it is very likely to have been known and circulating (pardon the tuning pun) well before. I find his arguments completely convincing.
Refer to p. 124, 5th edition.
I believe Claudio has more to say about Vallotti, so here is the topic to do so.