The right way to switch between groups

lidoravitan

What is the right way to switch between groups with ksp script?

I want to write script that switch group according to the held note.

for example: play note c(0) will switch to group a, play note D#(3) will switch to group D

EvilDragon

So, in your case you have 12 groups, and you want each C to trigger group 1, each C# to trigger group 2, etc.?

That's pretty simple:

on note
    disallow_group($ALL_GROUPS)
    allow_group($EVENT_NOTE mod 12)
end on

EvilDragon

Yes, group allowing is only scanned before actually playing a note, you cannot change this during a note. You would have to kill your first pressed note then play the right one based on user input, I suppose.

EvilDragon

Yes you can simply play all groups at the same time then modify their volume, but this will possibly play a lot of voices (depending on number of groups you have) and is definitely not gonna be CPU efficient.

EvilDragon

So, in your case you have 12 groups, and you want each C to trigger group 1, each C# to trigger group 2, etc.?

That's pretty simple:

on note
    disallow_group($ALL_GROUPS)
    allow_group($EVENT_NOTE mod 12)
end on

lidoravitan

@EvilDragon Thanks for your response. First, I wanted to verify I've got the point of allow/disallow groups.

Now, on my script it quite different, I want to allow_group based on played chord.

I wrote a script that runs "on note", and each time verify if it's a combination of chord. I mean it starts the calculation on each note played, and if at least 3 notes are held It could be a chord.

as you know midi sent message per note. so to calculate chord, "on note" called at least three time. I managed to recognize chord by patterns.

One note: This script written for specific use case. So In my use-case when consumer play C major, I received a chord notes between 0-45 (C/E/G) and the base note (C) on higher octave ( that helps me to know the base before I know the chord type)

Now I want to play loops/sample accordingly. I thought to play the loop/sample based on the base note immediately and when I got the chord pattern to switch between groups Major/Minor etc...

However it seems that allow_groups/disallow_group works for each note and not globally ( like mute/unmute groups), am I right? if, yes. do you have any thoughts?

EvilDragon

Yes, group allowing is only scanned before actually playing a note, you cannot change this during a note. You would have to kill your first pressed note then play the right one based on user input, I suppose.

lidoravitan

@EvilDragon  Is there a workaround for this limitation like changing the volume of the group? Or something you can think of

thanks

EvilDragon

Yes you can simply play all groups at the same time then modify their volume, but this will possibly play a lot of voices (depending on number of groups you have) and is definitely not gonna be CPU efficient.

lidoravitan

Yeah there is a trade-off. well, with that implementation it gonna play only one note per chord, which means one voice (loop) from each group at the same time. max of 8 group so it will be worth case 8 voices at the same time. wdyt? :) Is it really terrible trad-off?

thanks a lot