Re: no sound produce for bass staff

[Kaz Kylheku]

On Thu, 2 Sep 2010 20:48:20 -0700 (PDT), MING TSANG  wrote:  
>Additional info pertain to #1 below.
>
>On bar 15 I remove " ^markup{rit.}^\> \! " from the .ly file and re-run
>lilypond. The generated midi now can play bass staff till the end .

\> begins a crescendo terminated by \!

But you have nothing in between; your crescendo does not span any
notes. None of the documentation examples show a \> followed by \!.

The documentation gives examples like this one:

c2\< c\!

where the crescendo begins on one C and ends on the other.

It looks like these symbols must be preceded by a note.

If you do weird things that are not in the documentation, you
may tickle a bug.

The documentation says that "Spacer rests are needed to engrave
multiple marks on one note."  Presumably, the termination
mark \! counts as a mark being engraved!  The trick is to
make these spacer rests in parallel with the note being
decorated, as given by the example:

  << f1 { s4 s4\< s4\> s4\! } >>

See if doing something along these lines repairs your
code so that you have your MIDI as well as the dynamic marks.

Cheers ...