Script to randomize velocity in a specific range from the current input value

[Eon]

Hi, how hard is to create something like this?

In simple words i need that let's say my input velocity is 30 and i want it to be randomized in a range from 20 to 40. The built-in randomizer doesn't support relative values as i can see.

Thanks!

[wonshu]

Haven't tested this like crazy, but on first glance, this should do it: 

function HandleMIDI(event)
{
	event.velocity = Math.round(Math.random() * (40 - 20) + 20);
	event.trace();
	event.send();
	
}

PS: Ah: it doesn't set the note off to 0 ( which it should be ) - don't know how to do that... someone will chime in...

Edited February 14 by wonshu

[Dewdman42]

That assumes a known input velocity.  If you want it to be relative to whatever is coming in, then something like this:

function HandleMIDI(event) {
  if(event instanceof NoteOn) {
    // random value between 0-20 as int
    var offset = Math.floor(Math.random() * 20);
    event.velocity = event.velocity + (offset - 10);
    // should also make sure its valid velocity
    if(event.velocity > 127) event.velocity = 127;
    if(event.velocity < 1) event.velocity = 1;
    event.send();
  }
}

[Eon]

13 hours ago, Dewdman42 said:

That assumes a known input velocity.  If you want it to be relative to whatever is coming in, then something like this:

function HandleMIDI(event) {
  if(event instanceof NoteOn) {
    // random value between 0-20 as int
    var offset = Math.floor(Math.random() * 20);
    event.velocity = event.velocity + (offset - 10);
    // should also make sure its valid velocity
    if(event.velocity > 127) event.velocity = 127;
    if(event.velocity < 1) event.velocity = 1;
    event.send();
  }
}

Wow! That was fast! Thank you. Exactly what i need.

[Eon]

13 hours ago, Dewdman42 said:

That assumes a known input velocity.  If you want it to be relative to whatever is coming in, then something like this:

function HandleMIDI(event) {
  if(event instanceof NoteOn) {
    // random value between 0-20 as int
    var offset = Math.floor(Math.random() * 20);
    event.velocity = event.velocity + (offset - 10);
    // should also make sure its valid velocity
    if(event.velocity > 127) event.velocity = 127;
    if(event.velocity < 1) event.velocity = 1;
    event.send();
  }
}

But somehow its make a note longer, like a sustain pedal...why?

[Dewdman42]

sorry, dumb me...here is correction

function HandleMIDI(event) {
    if(event instanceof NoteOn) {
        // random value between 0-20 as int
        var offset = Math.floor(Math.random() * 20);
        event.velocity = event.velocity + (offset - 10);
        // should also make sure its valid velocity
        if(event.velocity > 127) event.velocity = 127;
        if(event.velocity < 1) event.velocity = 1;
    }
    event.send();
}

[Eon]

Thank you!

[wonshu]

13 hours ago, Dewdman42 said:

sorry, dumb me...here is correction

function HandleMIDI(event) {
    if(event instanceof NoteOn) {
        // random value between 0-20 as int
        var offset = Math.floor(Math.random() * 20);
        event.velocity = event.velocity + (offset - 10);
        // should also make sure its valid velocity
        if(event.velocity > 127) event.velocity = 127;
        if(event.velocity < 1) event.velocity = 1;
    }
    event.send();
}

As far as I can see that's exactly the same code as before.

Would you mind explaining?

[David Nahmani]

53 minutes ago, wonshu said:

Would you mind explaining?

In the original code, event.send() was inside the if statement, so that only Note on events were being sent. 

[wonshu]

In my code, yes, but the two versions of @Dewdman42 are identical, no?

[David Nahmani]

3 minutes ago, wonshu said:

In my code, yes, but the two versions of @Dewdman42 are identical, no?

No, I was comparing the two versions of @Dewdman42.

[wonshu]

Ah... my god... that is what I hate about coding... sometimes you just can't see it... even though it's right there.