I need the following properties to get nice ottava spanners (see
attached image):
\property Voice.TextSpanner \set #'type = #'dashed-line
\property Voice.TextSpanner \set #'dash-length = #0.3
\property Voice.TextSpanner \set #'dash-period = #0.5
\property Voice.TextSpanner \set #'edge-height = #'(0 . 1.3)
\property Voice.TextSpanner \set #'thickness = #1.5
\property Voice.TextSpanner \set #'edge-text = #'("8" . "")
\property Voice.TextSpanner \set #'font-shape = #'italic
\property Voice.TextSpanner \set #'font-series = #'bold
\property Voice.TextSpanner \set #'extra-offset = #'(0 . -1)
\property Staff.centralCPosition = #-13
a\spanrequest \start "text" b c a \spanrequest \stop "text"
Some problems:
. I want that the ottava line starts at the top of the `8', not in
the middle. How can I shift down the `8'?
. As can be seen above, I have to use `extra-offset' to move the
ottava line nearer to the note heads. I suggest that the value
of `edge-height' is not taken into account for computing the
distance between the note head and the ottava line. At least for
ottava lines this is not the right thing IMHO.
. Normally, `8' should be left from the note head. How can I
achieve that?
. How can I do the following easily? The accent is on *easily*, of
course -- I could solve it with splitted voice and turning off the
note heads, but this is uuuuugly.
| | |
O O O
8_|
Having an ottava line for just a single bass note occurs quite
frequently in piano music.
. Another needed feature: The ottava line should end immediately
after the note head, not after the corresponding time unit.:
Wrong:
| | |
O O O
8_______________________|
Right:
| | |
O O O
8_____________|
. A bug: Ottava lines as constructed above which are broken across
lines don't appear correct:
______________________
8 | < this shouldn't be here.
__________
8 |
Conclusion: We need a better interface for ottava lines.
Werner
