Midi note (number) to Velocity value??

Hi synthi ,

9X = XX XX X2

would pin any note's velocity to its note number

Regards, Nic.

Hi synthi ,

It is of course possible to write scaling code, but I will answer your latter questions before I get into that.

It really helps to understand MIDI messages - in this case, the note messages (I recommend Somascape MIDI Guide for understanding MIDI)

When you hold down a note, a note on message arrives with the note number and its velocity. These messages start with '9' in StreamByter (hex) parlance. When a note is released, a note off is sent, and these begin with '8'. For what you want to do, we are only interested in the events that start with '9'. In StreamByter we can use the letter 'N' to match both note on and note off events (but we're not doing that here)

The raw note on message looks something like this:

90 3C 40 (note on, channel 1, middle C, velocity = 64)

So the rule I gave you works on the above messages (3 bytes of data starting with a 9) and then copies the second byte (3C in the example above) over the top of the 3rd byte (40 in the example above) so the outgoing example message above gets rewritten to:

90 3C 3C

That's the basics of it. It might be worth taking a look at StreamByter University to learn about writing StreamByter code.

Now, if instead of just copying the note number to the velocity, you want to do some sort of scaling we need to write maths code. Something like:

if load
  # range of notes to scale velocity
  assign L0 = ^C1 ^C6
  assign L2 = L1 - L2 # calc range width
end
if MT = 90 # is this a note message starting with '9'?
  # scale the velocity (M2) based on note number (M1)
  assign M2 = 0 # (assume zero velocity)
  if M1 > L0
    if M1 > L1
      # dodgy scaling maths
      calc I0 = M1 - L0
      calc I0 = I0 * $127
      calc M2 = I0 / L2
    end
  end
end

The other way of doing it is with a note number to velocity lookup table which is covered in the manual and tutorial (I think). There are only 128 notes, so it's do-able, especially if most are 0. That way you can specify a curve. (I guess you could use MidiFire's pressure curve too for this)

Regards, Nic.