On Jul 8, 2013, at 8:42 PM, Emil B. Wojtacki <
[hidden email]> wrote:
TIME SIGNATURES
>
> For the handwritten fonts with protrusions you mention, I would suggest that the digits are supposed to be primarily numerators (so they are positioned still on the 4th line), and the additional metadata file stores the value for the proper leading (expressed in staff spaces).
I am planning for the metadata file to provide enough information on t/s digits that the current baseline approach (actually, pretty much any baseline approach) would be adequate. I don't see any way to dodge the need for additional metadata if we are to allow arbitrary-height digits. I would expect this data to include:
- recommended baseline placement for numerator digits relative to staff center line
- recommended baseline placement for denominator digits relative to staff center line
>
> I am tempted to suggest, that perhaps C and ¢ should be positioned so, that they are placed correctly if font baseline is aligned to the centre of 4th line.
Under the new approach to clef-like symbols (which these are, in a layout sense), such symbols should be centered on the font baseline since by default they "apply" to the center line of a staff. They are not t/s digits.
RESTS
> In fact, Petrucci and Opus have rests centred on the font baseline (so I did not propose anything new) with exception for semibreve rest, which is placed one space higher. But for the easy of handling rests on non-standard staves (which are standard for percussion) and for more flexibility with polyphonic notation in the old-style alla breve time, I suggest this one change concerning the semibreve rest.
Based on the comments so far, I'm agreeing that perhaps we need to move away from totally uniform registration of all rests and explicitly state that the semibreve rest is registered relative to the line from which it hangs, not the center line of an imaginary staff.
…Joe
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