Does this have to do with our instrumentation work? I recognize the "-33" from the contrabass saxophone.
----- Original Message ----- From: "D. Michael McIntyre" <[EMAIL PROTECTED]> To: "rg-devel list" <[email protected]> Sent: Saturday, August 05, 2006 5:26 AM Subject: [Rosegarden-devel] What to do for key at transpose -33 >I asked this question in a comment in a bug report, and nobody caught it. > > Here's a typical example: > > Key == C major > Transpose == -2 > > Notation wants to be written at D major to sound correctly. It goes up by > two > accidentals. From zero accidentals to two accidentals. > > Now how do you handle that when the number of accidentals gets higher than > 7? > > I don't have the foggiest clue, and don't even know what to google for. I > doubt an answer is out there in terms of -2 and +2. It's probably about > minor diminished 13ths or something, if it's out there at all. > > So what's the formula here in code terms? > > Something like > > concert_pitch_key_accidental_count - segment_transpose_property > > would work for most cases. > > Key == C major, concert_pitch_key_accidental_count == 0. > > Transpose == -2 > > 0 - -2 = 2 > > The key with +2 accidentals from C major is D major. > > Or the opposite > > Key == C major, concert_pitch_key_accidental_count == 0 > > Transpose == 2 > > 0 - 2 = -2 > > The key with -2 accidentals from C major is Bb major. > > That much seems sane, reasonable, and predictable, but what happens when > the > number exceeds +/- 7? We don't support keys with more than 7 accidentals, > and I wouldn't expect it to be common for a -33 instrument to read a key > in > > Key == C major, accidental_count = 0 > > Transpose == -33 > > 0 - -33 = 33 > > 33 accidentals. What the hell kind of crazy key would that be? It would > have > to have triple sharps or something. > > So I'm sure there is a perfectly sane solution to this, but I haven't a > clue > whatsoever what that solution might be. > > Help? Please? Anyone? > > -- > D. Michael 'Silvan' McIntyre ---- Silvan > <[EMAIL PROTECTED]> > Linux fanatic, and certified Geek; registered Linux user #243621 > > Author of Rosegarden Companion http://rosegarden.sourceforge.net/tutorial/ > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys -- and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Rosegarden-devel mailing list > [email protected] - use the link below to unsubscribe > https://lists.sourceforge.net/lists/listinfo/rosegarden-devel > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Rosegarden-devel mailing list [email protected] - use the link below to unsubscribe https://lists.sourceforge.net/lists/listinfo/rosegarden-devel
