Very very skeptical about this "different frequency" business.

B sharp only exists in keys that require that note to be notated that way because there is alredy a C# so there can't be a C too.

If you slightly flatten or sharpen one of the notes just because you are in a new key, you will have made that note out of tune with the other notes in the new key, which haven't been flattened or sharpened.

Are proponents of this view trying to suggest that Keys with B# in are meant to be dissonant?

And if so, why only on violins etc, why not on Pianos?


There are many more questions to be asked, but to believe this noton I would need satisfactory answers to those for sure.