I'm writing a piece in 4/4, so complicated that I asked for my
first M-Tx > PMX > tex compile before completing the first bar.
PMX complained. Reason: if the last bar of a piece is incomplete,
M-Tx issues a blind meter change to make it look complete. But
now the last bar is also the first bar. Boiling down the problem
to a near-minimal input file, I came up with the following PMX
input file:
=========================== % ===================================
---
---
1 -1 1 4 4 0 6 0.00000 0 1 1 20 0
0
./
m3/8/0/0
da84d da1- da8 /
=========================== % ===================================
which produces
=========================== % ===================================
This is PMX, Version 2.504, 02 Nov 04
Opening bug.pmx
Starting first PMX pass
ERROR in line 8, bar 2 Pickup bar length disagrees with mtrnum0
v
da84d da1- da8 /
^
=========================== % ===================================
I make the deduction that a meter change at the start of the first
bar is not allowed.
It has been noted before on this list that a clef change at the
start of the first bar is ignored.
Both of these represent undocumented behaviour. A logical argument
can be made out that a meter change at this point is preposterous,
but there are situations in which a clef change is logical.
As the author of a brief PMX tutorial, soon to be revised, I am in
a quandary whether to document this behaviour.
Dirk
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