I was experimenting using Rosegarden to transpose segments.
I select the option to have it change the key-signature.I noticed when I took a piece in the key of C (no flats or sharps), and transposed it up one half-step (+1), it changed the key-signature to 7 sharps.
This is correct, but this key is tonally the same as D-flat major (5 flats).
Wouldn't it be better to assume the lesser complexity (5 flats rather than 7 sharps)?
Admittedly, there is a similar, more ambiguous situation, where a transposition of 6 half-steps up (or 6 half-steps down), is either 6 sharps, or 6 flats, and how do you decide which to use? The user might want one, or the other.
I tried transposing up from C, up to D-flat, and opened the segment with the notation editor, and the key-signature was 7 sharps, but with flat-accidentals in front of most (but not all) of the notes.
So I wonder if transposition is working (notationally) as expected.Tonally, the transposition sounds right, and it looks right in the matrix editor.
I have attached the Rosegarden file I experimented with. I'm using Rosegarden 15.12 (the version that comes with Ubuntu 16.04). -- Sincerely, Aere
PianoImprov-20160903.rg
Description: audio/rosegarden
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