Request: Latch sustain MIDI Notes using CC

Hi synthi ,


# auto chord hold by audeonic
IF LOAD
 ASS L80 = 0 # held note count
END

9X XX 00 = 8X
IF MT == 90
 # new note on
 IF L80 == 0
   # issue/reset pending note offs
   ASS I0 = 0
   MAT I1 = 80 + MC
   IF I0 <= 7F +L
     # send pending note off
     IF LI0 == 1
       SND I1 I0 00
       ASS LI0 = 0
     END
     MAT I0 = I0 + 1
   END
 END
 # increment held count
 MAT L80 = L80 + 1
END

# handle note off
IF MT == 80
 MAT L80 = L80 - 1 # decrement
 ASS LM1 = 1 # mark as pending
 XX = XX +B # block note off
END


I will come clean - I just typed this in. Might be syntax or logic errors. Please let me know how you get on.

Regards, Nic.

Hi synthi ,

Err, yeah, that code sends the new note on before the note offs. So, we need to send the new note on *after* those note offs instead. It's a bit of a cheat, but if you add these two lines to the bottom of the script that should fix that:

9X = XX +C
9X = XX +B

which clones the note on and then blocks the original. The clone will be put onto the queue after any note ons.

And of course, when you release the last chord, it will sound forever. It is possible to use a CC to fix this, and again, this is a bit of a lazy cheat:

BX 50 7F = XX 7B 00

Which will look for a CC 80 ON (any channel) and issue an 'all notes off' CC in its place. Obviously you will want to change that '50' in the rule above with the hex value of the CC you wish to use. You can put that line at the end of the script also (or the beginning, or the middle - just not inside any existing IF statements).

However, if your sound generator does not honour the 'all notes off' CC, then to switch it off the correct way:

# turn off held notes when CC80/CH1/ON is seen
IF M0 == B0 50 7F
  # issue/reset pending note offs
  ASS I0 = 0
  MAT I1 = 80 + MC
  IF I0 <= 7F +L
    # send pending note off
    IF LI0 == 1
      SND I1 I0 00
      ASS LI0 = 0
    END
    MAT I0 = I0 + 1
  END
END


Now, that's a repeat of the note off code that is used when we have the new note on. There are ways of avoiding having to reproduce the same code in two places, but let's keep things simple for now. ;-)

Regards, Nic.

upfated and now I’m getting errors everywhere...:

# auto chord hold by audeonic
IF LOAD
#ERR   ASS L80 = 0 # held note count
END

9X XX 00 = 8X
IF MT == 90
#ERR   # new note on
#ERR   IF L80 == 0
#ERR     # issue/reset pending note offs
#ERR     ASS I0 = 0
#ERR     MAT I1 = 80 + MC
#ERR     IF I0 <= 7F +L
#ERR       # send pending note off
#ERR       IF LI0 == 1
#ERR         SND I1 I0 00
#ERR         ASS LI0 = 0
#ERR       END
#ERR       MAT I0 = I0 + 1
#ERR     END
#ERR   END
#ERR   # increment held count
#ERR   MAT L80 = L80 + 1
END

# handle note off
IF MT == 80
#ERR   MAT L80 = L80 - 1 # decrement
#ERR   ASS LM1 = 1 # mark as pending
#ERR   XX = XX +B # block note off
END

I was thinking about a formating problem but no luck

I updated streambyter....
I’m trying copy paste from firefox, safari and even first copying to notes App but I Getafe those errors.....
Other scripts I copy/paste are working btw