Getting Audio out of the plugin - by dragging to the DAW..

[Lindon]

...just like MIDI

Did I see something about this being available?

[Christoph Hart]

https://docs.hise.audio/scripting/scripting-api/engine/index.html#renderaudio

[clevername27]

@Christoph-Hart @Lindon Both of these functions are interesting. Is there example documentation on them (dragging audio and MIDI) beyond the documentation reference? (It seems like there's a lot of possible variables in these tasks, especially audio—and then there's mechanics of how you expose the data to be physically dragged.) I'd really appreciate, thanks.

[DabDab]

@clevername27 said in Getting Audio out of the plugin - by dragging to the DAW..:

@Christoph-Hart @Lindon Both of these functions are interesting. Is there example documentation on them (dragging audio and MIDI) beyond the documentation reference? (It seems like there's a lot of possible variables in these tasks, especially audio—and then there's mechanics of how you expose the data to be physically dragged.) I'd really appreciate, thanks.

An Example Snippet please.

[clevername27]

@DabDab Thank you for your reply—are you asking me to provide a snippet, or suggesting that someone else do so? If the latter, I can't provide a snippet, as I am not familiar enough with the subject to create a framework.

[Christoph Hart]

Usually I'm waiting for the things that I implement for a project until some time has passed and the API has stabilized, but this is the case here.

You basically give the Engine.renderAudio() function an array of MessageHolder objects that contain a MIDI sequence and then it will render the audio on a background thread and continuously calls a supplied JS function with a callback that contains some state.

inline function createEventList()
{
	local events = [];
	
	local on = Engine.createMessageHolder();
	on.setType(1);
	on.setChannel(1);
	on.setVelocity(127);
	
	on.setNoteNumber(55);
	on.setTimestamp(0);
	
	local off = Engine.createMessageHolder();
	off.setType(2);
	off.setChannel(1);
	off.setNoteNumber(55);
	
        // calculate the length you want somehow
	local numSamples = getRenderLengthSamples();
	
	off.setTimestamp(numSamples/8);
	
	local on2 = Engine.createMessageHolder();
	on2.setType(1); // note on
	on2.setChannel(1);
	on2.setNoteNumber(56);
	on2.setVelocity(127);
	on2.setTimestamp(numSamples);
	
	local off2 = Engine.createMessageHolder();
	off2.setType(2); // note off
	off2.setChannel(1);
	off2.setNoteNumber(56);

	off2.setTimestamp(numSamples);
	
	events.push(on);
	events.push(off);
	
	events.push(on2);
	events.push(off2);

	return events;
}

// this is being called periodically (~every 500ms) so you can update a progress bar
inline function onRender(obj)
{
	// contains the (full) audio signal that has been rendered so far...
	// an array of Buffer objects for each channel.
	local d = obj.channels;

	// the render progress from 0...1
	local progress = obj.progress;

	// a bool when the render is finished
	local isFinished = obj.finished;
}

Engine.renderAudio(createEventList(), onRender);

[clevername27]

@Christoph-Hart Thank you, kindly.

[DabDab]

@clevername27 Yeah, I thought. But We have got a script from @Christoph-Hart .