Re: calculating durations

[Matthew M. Munz]

Erik & Han-Wen,

  I'm not sure that either example does precisely what I need.  The  
algorithm I want should convert c3 into c2. and c7 into c1 tied to  
c2. in the next bar.  The source format describes notes in terms of  
absolute durations, and not in terms of traditional notation.  For  
some of the details of tieing, I think Completion noteheads will come  
in handy, but I'm not sure if it will accommodate my entire  
conversion task, as described.

  - Matt Munz

On Sep 16, 2005, at 2:40 PM, Erik Sandberg wrote:

> On Friday 16 September 2005 20.21, Han-Wen Nienhuys wrote:
>
> > Erik Sandberg wrote:
> >
> > > >  I'm especially thinking of how to resolve a note like  
> > > > "c3" (where 3
> > > > means 3 quarter note beats) into Lilypond's "c2."  Any  
> > > > suggestions?  I
> > > > suppose this problem relates to "quantization" but in this case,  
> > > > the
> > > > input data is mostly "clean" and unambiguous.  I don't think the
> > > > solution should be too compilcated.
> > >
> > > This is done by midi2ly, so both the above solutions would fix this.
> >
> > not that I know of . I guess you'd be better off with Completion
> > noteheads. (see the manual).
>
> I ran lily (2.4) on this score:
>
> \score{
> { c4. d8 e2 e2. f4 }
> \midi{}
> }
>
> Then I ran midi2ly on the resulting midi file. The resulting .ly  
> contains:
>
>   c4. d8 e2 |
>   % 2
>   e2. f4 |
>
> .. which, as far as I understand, shows that midi2ly does what  
> Matthew needs.
> (bug or feature? :) )
>
> Still, it's a good idea to look at completion heads, to properly  
> handle notes
> that cross bar boundaries.
>
> --
> Erik