onNoteOn() - Illegal operation in audio thread: String creation (in HISE plugin only!?)

[Christoph Hart]

You basically have two tasks in one function that cannot coexist:

• you can only change the note number in a synchronous callback
• you can only do UI stuff in a deferred callback

You'll need to untwist that into separate functions. Ideally anything that changes the note number is a separate script and the rest can stay in the main UI script.

[gorangrooves]

@Christoph-Hart Thank you!

So, lets say I create a script file called extra.js.

Inside it, I put the script relevant to the mapping (and anything else which may currently cause an error), including the relevant onNoteOn portion of the script.

I include the script in my project with

include("extra.js");

before the line

Synth.deferCallbacks(true);

And that should do the job?

[d.healey]

@gorangrooves You need to put the audio stuff in a completely separate MIDI processor.

[gorangrooves]

@d-healey So, I create a MIDI script processor for the Main Container (the sampler window) and put all of this there?

[d.healey]

@gorangrooves I can't say without being more familiar with your project.

Anything that is not UI related needs to go into one or more separate MIDI processors.

[gorangrooves]

@d-healey Ok, but are we talking about the same thing? See the image, please.

[d.healey]

@gorangrooves Yes

[gorangrooves]

@d-healey Alright. Thank you. I'll give it a shot.

[gorangrooves]

I am getting nowhere with this. It is like a f'ing Rubik's cube 🥴
Is anyone of you guys available 1-on-1 to help me with this? I'll compensate you fairly. I want to get this done asap and move on.

[Lindon]

@gorangrooves

so you need to get this bit of code into your seperate midi processor - the one you've identified.

arrayPos = noteTriggers.indexOf(Message.getNoteNumber());
    if (arrayPos > -1)
    {      
       Message.setNoteNumber(noteSources[arrayPos]);  // yes so play its matching source note
    }else{
       Message.ignoreEvent(true); // no ignore it..
    };

so it wont know about noteSources, so you need a way to tell it - ahead of time when noteSources changes - or explicitly if its always the same.

so either:

declare noteSources in the midi processor init and populate it
or
make noteSources a global variable (not a great solution)
or
create a table in the MIDI processor that you can reference (and set) from your UI script

[gorangrooves]

Update: @Lindon saved the day (and a few more) by helping me today. I got the scripts separated. Massive thanks!