On Jul 9, 2005, at 2:10 PM, Owain Sutton wrote:
In many cases the new 'deciaml' metronome marking is reached by an
accel/rall from the old tempo - how would you notate that?
Look, either there is a proportion or there isn't. If there is, you
can put it in a tempo marking (e.g.: "8:7 faster"), and if there
isn't, you can't put it in a time sig. Throwing in rits. or accels.
makes no difference.
Why do they make no difference? All that I'm talking about is a
transitition from one tempo, to another 9/8ths faster. What is the
problem with that?
OK, lets do this in baby steps.
If I have an accelerando followed by a new tempo, then there are only
four possibilities:
1) The accelerando leads smoothly up to the new tempo, in which case
the instructions should be "accel....al...9:8 faster" (I suspect this
is the case you had in mind.)
2) The accelerando overshoots the new tempo, at which point,
therefore, a sudden tempo drop must occur. If the accel. begins in
measure 139, say, then the instructions are "accel... a tempo, 9:8
faster than m.139"--or some similar wording.
3) The accel. undershoots the new tempo: "poco accel... ancora più
mosso (9:8 faster than m. 139)" or the like.
4) The proportion applies to the speed at the end of the accel, not to
the speed before it began: "accel... subito 9:8 faster."
Analagous instructions would be applied for ritardandi, so a proportion
can therefore always be written as a tempo indication. The presence of
an accel. or rit. makes no difference to that fact.
Andrew Stiller
Kallisti Music Press
http://home.netcom.com/~kallisti/
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