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I've never seen it before, and I found it on this video. I know it's an accidental, though.

short horizontal bar with downward stem containing diagonal crossbar

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  • A timestamp would be helpful.
    – Aaron
    Commented Aug 23, 2023 at 20:16

1 Answer 1

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The video indicates that the score was created in MuseScore 3. Looking through the accidentals in that software, this one stands for "raise by one equal tempered quarter". Basically, it's a quarter-tone sharp.

Accidental with tooltip in MuseScore 3

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  • 1
    I recently heard this glyph called a half-sharp. Commented Aug 23, 2023 at 23:10
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    @ToddWilcox the traditional half sharp lacks the horizontal crossbar at the top of the vertical stroke, which I suppose is intended to specify equal temperament as it resembles the letter T.
    – phoog
    Commented Aug 24, 2023 at 8:05
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    @ToddWilcox on reflection, though, I do find this symbol to be a bit useless. First, it's hard to read. Note how the crossbar is almost lost by its proximity to the staff line. The tenuto marks don't help. Second, it's probably TMI. If there are no other places in the piece that use a different variety of quarter tone, just specify 24-TET and use a normal half-sharp symbol. If so, do you have musicians who can play them accurately? If so, can you really hear the difference?
    – phoog
    Commented Aug 25, 2023 at 8:16
  • @phoog I vote we create a scale containing neither 'equal' nor 'just' tempered intervals, but rather 'evil' and 'unjust' . Commented Aug 25, 2023 at 18:52
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    @CarlWitthoft "Concerto in C Maladjusted for Kazoo and Convicted Felon"
    – Aaron
    Commented Aug 25, 2023 at 18:59

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