i use return -1 :)) because this check func is used in other func and and i get numbers for diff errors, and other things

/// This if statement isn't needed
if (typeof file !== "object" || file == undefined || file == null) return -1;

I thought it was a problem for that file and that's why I was getting an error at loadAsObject,
but your version is a working method ... with loadAsString , and after parseAsJson,

THANK YOU

@d-healey

I made a screen recording that shows what this custom sample map contains. It is for different sample folders, allowing users to import samples and create a custom sample map for their samples.

https://youtu.be/WYQBhiX_XOQ

@d-healey the purpose of my proj is the user to use vst in live performance ,
for keyboard or midi accordion(very popular in my country),
i wanted to know if exist a solution to change sample map without kill audio engine,
because in our music style the samples sound it changes very often,
and that time of preloading is a problem, I thought I could somehow do the preloading in another sampler without killing the current sampler.

@deniskorg

@d-healey said in Question About Sample Map Preloading...:

Is the purpose to switch between articulations?
no, not for articulations

i put a video with project,

https://youtu.be/efMDoMjzs00

and I've been stuck for a while, because I relied on that lazyload, but I didn't test on large samples, and I continued to work without thinking about this problem that I won't be able to quickly change samplemaps, and I thought that I would could somehow in the background task do preloading in another sampler, while the other modules don't stop

@d-healey my project is a samples player... in my country , Romania, is very used that samples module Juzi Sound, and i want to create same with hise...for live keyboard players, and it needs to change quickly that preset without affect live playing... and i not use hlac compression, because, users can modify samples from a sample map, combine them, modify name, import new Samples, Create new Sample map, etc...like JuziSound.

@d-healey I understand, thank you! so the solution for me is to use it lazyload and small samples( because with lazyload , for large sample , is sound weird), to change that samplesmap almost instantly

i have 2 samplers, i change samplemap for sampler1, sampler 2 stops playing, and after preloading from sampler1 is finished, both of them is playing! I want to know if exist a method to make that preloading without affect others samplers...

@d-healey it works, thank you

And David...maybe I'm wrong somewhere but if i use this

const ARR_TEST = [1, 2, 3];
if(ARR_TEST.length !== 3)
Console.print("test");

but if i use this it work
if(parseInt(ARR_TEST.length) !== 3)
Console.print("test");

i use return -1 :)) because this check func is used in other func and and i get numbers for diff errors, and other things

/// This if statement isn't needed
if (typeof file !== "object" || file == undefined || file == null) return -1;

I thought it was a problem for that file and that's why I was getting an error at loadAsObject,
but your version is a working method ... with loadAsString , and after parseAsJson,

THANK YOU

thank you David ,
local s = file.loadAsString();
local obj = s.parseAsJSON();

if i use this it work