Dorico’s harp pedal feature behaves as if the very lowest C and D strings on the harp have pedals. This is not true. No concert grand pedal harp from any part of the world has discs/pins on these two strings. Harpists tune these lowest two strings to whichever accidentals needed before the piece, and unlike with a timpani, it is not possible to inconspicuously stand up and silently re-tune these strings in the middle of a movement.
It would be much more accurate to reality if Dorico behaved as follows:
First, when a composer does use the lowest strings, whatever accidental the lowest C or D string has in its first appearance becomes the string’s “state.” If the composer uses that same string again with a different accidental, this note appears in red and cannot be made un-red through adding a pedal. For instance, if the score uses lowest C-natural first and then lowest C-flat later, the C-flat appears in red and can’t be made un-red. Or if the lowest C-flat appears first and then lowest C-natural later, this time the C-natural is permanently red.
Second, the initial appearance of the lowest two strings should never be in red, no matter what the pedal setting is. These two strings are completely unaffected by the pedal setting, so however they first appear is how the harpist will tune them beforehand.
Despite orchestration manuals’ clear statements on the matter of the lowest two harp strings, it is amazing how many professional composers are unaware of these facts and write something involving lowest D, D-flat, and C, for instance, which is completely impossible. Or they write lowest C, C-sharp, and C, with a pedal change, when they should write lowest C, D-flat, and C with no pedal change. Or they write only one instance of one of these lowest two strings but include a completely unnecessary pedal change. I would like to see Dorico help future composers not continue to make these mistakes.
Just switched after using Sibelius for eleven years–I truly appreciate Dorico’s harp pedal feature and many thanks to the team for the careful thinking that went into this!