Christoph Dalitz <[EMAIL PROTECTED]> wrote:
> "Ewan A. Macpherson" wrote:

> > > ? (In the case that `grace' is not specified we could fall back to,
> > > e.g., a standardized default of `grace="1/8"'.
> > 
> > Except for K:Hp or K:HP, where the default should be 1/32 .
> > 
> Was this the default in the old standard?

It is in Eric Mrozek's Highland-pipe-friendly version of abc2ps:
http://www.eecs.umich.edu/~mrozek/abc/abc2ps.html#bagpipe
which AFAIK is the only tadpole-producing abc software which implements 
all the desired special behaviours which should invoked by K:Hp and 
K:HP. The standard unfortunately doesn't mention the gracenote length 
issue associated with K:HP, only the key sig and stem directions, but I 
think this would be a reasonable default. K:HP is for Highland pipe 
music specifically, and we like our gracenotes short (and slash-free)!

The standard itself doesn't say anything about how gracenotes should be 
displayed. In the V1.6 standard, it says "Grace notes have no time 
value and so expressions such as {a2} or {a>b} are not legal."

In the draft standard we have, "Although nominally grace notes
have no melodic time value, expressions such as {a2} and {a>b} can be
useful and are legal although some packages may ignore them."

cheers,
Ewan Macpherson
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