thank you very much, I had forgotten this notation's existance.
Now all just work fine. I'll add this in my abc tutorial (in
french)
Writing F5/4 will cause problems for most display programs, since
the time value 5/4 can't be displayed as a single note in staff
notation. Player programs will
in Abc notation, for playing 5 notes in the time of 4 we can use
quintuplet. Now, let think I want the opposite, playing 4 notes in
the time of 5. How can I do that ? I used for ex :
F,5/4F5/4C5/4F5/4 instead of F,FCF . It seems correct this way,
but some applications seems to complain (abcm2ps
in Abc notation, for playing 5 notes in the time of 4 we can use
quintuplet. Now, let think I want the opposite, playing 4 notes in
the time of 5. How can I do that ? I used for ex :
F,5/4F5/4C5/4F5/4 instead of F,FCF . It seems correct this way,
but some applications seems to complain (abcm2ps