Re: What's a moment?

[Mats Bengtsson]

A quarter note is represented as 1/4, a dotted half note as 3/4, ...
Obviously it makes sense to add and subtract moments, but
since they internally are represented as rational numbers, you
also get multiplication and division for free.

    /Mats

Peter Chubb wrote:

> Hi,
>         Reading the scheme code and the documentation, I'm struggling
> with the concept of a moment in Lilypond.  The documentation says it's
> a rational number that represents a moment in musical time.
> Therefore there should be a way to add a duration to a moment to get
> another moment.  But there doesn't seem to be.  Likewise, there *are*
> functions for adding, subtracting, multiplying and dividing moments.
> Which makes no sense if a moment is a point in time.
>
> So what *is* a moment?  What do the numerator and denominator
> represent?  Beats?  Bar numbers?  Milliseconds from the start of the
> piece?  Inquiring minds want to know.
>
>
> --
> Dr Peter Chubb  http://www.gelato.unsw.edu.au  peterc AT gelato.unsw.edu.au
> http://www.ertos.nicta.com.au           ERTOS within National ICT Australia
> A university is a non-profit organisation only in the sense that it
> spends everything it gets  ... Luca Turin.
>
>
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>  


--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
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