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Key Signatures with Double Sharps/Flats

Discussion in 'General Instruction [BG]' started by Ben_P, Sep 20, 2004.

  1. Ben_P


    Oct 2, 2001
    Alberta, Canada
    Example: if I was going to write an A# major scale key signature would I use the double sharp symbol in the key sig.?
  2. Ed Fuqua

    Ed Fuqua

    Dec 13, 1999
    Chuck Sher publishes my book, WALKING BASSICS:The Fundamentals of Jazz Bass Playing.
    Don't confuse yourself unduly, enharmonic notes are there to discuss function, primarily. If you travel around the Circle of Fifths (which is where and how you build key signatures) you don't see A#. The key signature you're looking for is Bb major, which has two flats.
  3. Ben_P


    Oct 2, 2001
    Alberta, Canada
    Yeah, I understand all that stuff. It's an assignment for school. I'm not writing out a chart in A# or anything like that.
  4. Mike Dimin

    Mike Dimin

    Dec 11, 1999
    Since there can only be one of each "named" note in a major scale, you would use the double sharp

    i.e. A#, B#, C##, D#, E#, F##, G##, A#

  5. Lyle Caldwell

    Lyle Caldwell

    Sep 7, 2004
    Well, you wouldn't write a piece in A#, but I guess it's conceivable that a piece might modulate to A# for a bit, requiring a key sig with double sharps.

    Depends on how the modulation is prepared. I can't think offhand of an example of it, but I won't say "impossible." But a "Beach Boys modulation" (up a half step) would just be notated in Bb, as there's no preparation for that kind of modulation.
  6. Actually, I think the correct notation for double-sharp is "×"

    …so it would look something like

    A# B# C× D# E# F× G× A#

    - Wil
  7. Mike Dimin

    Mike Dimin

    Dec 11, 1999
    Yeah and of course the sharps would come before the note