I finally got around to reading The First Violin by Jessie Fothergill. I downloaded it ages ago when it was mentioned on here and only just got around to reading it.
I really enjoyed it, even if at the start I was mostly just startled by all the names which are more familiar to me as EBD characters. If I remember rightly Grizel was reading this in one of the Tirol books and EBD must have been a fan too. There are main characters by the names of Eugen Corvoiser (so?) and Karl Linders to name but a few!
It was written in the 1870's and it is free on Amazon/ Gutenberg. There is lots of music, and lovely scenes of life in Germany and some romance and I whizzed through it in a couple of days.
Beware though for those who are not a fan of young Robin for there is an Engelkind in this novel too.