Sow this is a long note:
freq({n+Gbd2},6000
pause 20*S-C
And this is a short note:
freq({n+Gbd2},3000
pause 20*S-C+450
1900/128,000=0.15
3000/0.15=450
or even better:
long note:
freq({n+Gbd2},S*20-C*15+6000
short note:
freq({n+Gbd2},3000
pause 20*S-C+450