Step Sequencer

Hi, I'm trying to control the volume of an instrument with a step sequencer, but I get an error at line 9, can someone tell me what the problem is?

Code:

on init
declare polyphonic $counter
declare ui_menu $length
declare ui_knob $numSteps(1,16,1)
$numSteps := 16
make_persistent($numSteps)
declare ui_table %steps[16](4,4,127)
end on

on note(%steps)
ignore_event($EVENT_ID)
while($NOTE_HELD = 1)
play_note($EVENT_NOTE,%steps[$counter],0,1)
$counter := $counter + 1
if($counter >= $numSteps) $counter := 0
end if
end while
set_engine_par($ENGINE_PAR_VOLUME,%steps[$counter],-1,-1,-1)
end on

 

your on note call back can't have a parameter
you can't say
on note ( do something)
end on

all ni callbacks have to be like
on init
end on

on note
end on

etc

 

Got it, thanks.
I fixed the error, but the script still doesn't work.
Any idea why?

 

You're playing VERY short notes because your last play_note() argument is set to 1 microsecond

 

Thanks, I didn't know that.
My goal though is to control a parameter with the step sequencer, not playing notes with it.
I put set_engine_par inside the while loop and got the volume to move to zero when I play a note, but it stops there.
Any idea why it doesn't keep going?

Code:

on init
declare polyphonic $counter
declare ui_menu $length
declare ui_knob $numSteps(1,16,1)
$numSteps := 16
make_persistent($numSteps)
declare ui_table %steps[16](4,4,127)
end on

on note
ignore_event($EVENT_ID)
while($NOTE_HELD = 1)
play_note($EVENT_NOTE,%steps[$counter],0,1000000)
$counter := $counter + 1
set_engine_par($ENGINE_PAR_VOLUME,%steps[$counter],-1,-1,-1)
if($counter >= $numSteps) $counter := 0
end if
end while

end on

 

not quite sure what you're up to here Carlos, but I can tell you that you shouldn't confuse velocity volume with engine par volume.
engine par volume is an instruction to adjust an amplifier somewhere and in your case where you said -1,-1,-1), that is the master volume on the interface, whereas the velocity volume in play_note is an instruction to play a zone on a map at an agreed place. This has no effect on volume unless you set up the internal modulator to apply volume velocity. Hope this helps

 

I'm just trying to learn how to modulate a parameter with a step sequencer. I chose the master volume because it's easier to test/see it.
I thought ignore_event would prevent the notes to have the ordinary effect in order to be used to trigger the sequencer. Thanks for the help.

 

ok cool, well the table is only a possible front end for a step sequencer. A step sequencer is probably a few thousand lines of code, you can study one in the kontakt ksp templates.

 

Not really, the step sequencer is pretty simple. The main mistake here is that there's no a wait() command. This should work:

Code:

on init
    declare $counter
    declare ui_knob $numSteps (1,16,1)
    $numSteps := 16
    make_persistent($numSteps)
    declare ui_table %steps[16] (4,4,127)
    make_persistent(%steps)
end on

on note
    while($NOTE_HELD = 1)
        set_engine_par($ENGINE_PAR_VOLUME, %steps[$counter], -1, -1, -1)
        $counter := ($counter + 1) mod $numSteps
        wait($DURATION_SIXTEENTH)
    end while
end on

Note that this sequencer will stop the moment you release the key, so if you have some release time in your amp envelope, the volume modulation will abruptly stop...

It would be better to do this with listener callback.

 

Thanks for the code, but still doesn't work. You mean replacing on note for on listener?