Code 7 -- Trills, Ottava, Pedal marks --

  parameter structure
 ___________________________________________________________________
|    p1   |     p2    |      p3        |     p4       |     p5      |
|code num.| staff num.| horizontal pos.| vertical pos.| size, other |
|____7____|___________|________________|______________|_____________|

 ___________________________________________________________________
|           p6          |      p7    |   p8   |         p9          |
|right end of line, etc.| symbol type| various| pedal or wiggle size|
|_______________________|____________|________|_____________________|


Trills:  p7 = 0
         p5 = size,  p6 = right end of wiggle (= 0 = no wiggle)
         p8 = accidental above trill (1 = flat, 2 = sharp, 3 = natural)
         p9 = wiggle size (default = .75)



*
Ottava, Ottava Bassa, Quindicesima:
         p7 = 8 (ottava), = -8 (ottava bassa), = 15 (quindicesima)
         p7 = 88 makes ottava using "8" only. (No "va" part)
         p5 = size,   p6 = right end of dashed line
         p8 = dash size,  p9 = size of space between dashes
         p12 = + = bracket up at end of dashes, = - = bracket down


Graphic harp pedal symbols:  p7 = 1
             p5 = size
             p6 = 0
             p8 = left 3 pedals -- a 3-digit number
             p9 = right 4 pedals -- a 4-digit number

                   for p8, p9:  1 = bottom pedal position
                                2 = middle   "      "
                                3 = top      "      "

                    p8 = 111 = all left pedals in bottom position, etc.


*
Graphic piano pedal symbols:  p7 = 20
      P5 is a 3-digit number which shows which pedals should be
      depressed at any given time.  A one = pedal down; a zero = pedal up.
             p5 = 001 = right pedal down
                = 101 = both left and right pedals down
                = 010 = middle pedal down

             p6 = end point for line to right (p6 = p3, or = 0 = no line)
             p8 = position of line extension to the left (only if p6 > 0)
             p9 = pedal symbol size factor
             p11 = + = bracket end on left side (using p8) (+100 = arrow)
             p12 = + = bracket end on right (using p6) (+100 = arrow)

Piano pedal lines:  p7 = 21, 22
        P5 = 0
        p6 = end point for line to right
        p8 = position of line "glitch" to show pedal action
        p9 = 0
        p11 = + = bracket end on left side (using p8) (+100 = arrow)
        p12 = + = bracket end on right (using p6) (+100 = arrow)

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