Sample Rate changes

[resonant]

Is there a function that can automatically run when the DAW's sampling rate changes? Or how can we achieve this?

[David Healey]

@resonant Transport handler perhaps https://docs.hise.audio/scripting/scripting-api/transporthandler/index.html

[resonant]

@David-Healey There doesn't seem to be anything related to sample rate in Transport Handler :(

[griffinboy]

@resonant

We do have it in c++ nodes (function called prepare() gets loaded with sample rate when it changes)

If you need Hise to know about sr changes you can make a c++ node that then uses a global cable to trigger a hise global cable callback when sr changes...
But yeah that's obviously a workaround.

Maybe Christoph can add a Hise function for this so that there is an easier way.
But if its something you absolutely need, I can show you how to set it up.

[ustk]

@resonant There is no callback that can be automatically called when the audio state changes, but you can periodically call Settings.getCurrentSampleRate()

EDIT: or like @griffinboy suggested by getting it from the audio thread...

[ustk]

@griffinboy you don't need a cable, just read a global var that updates from any scriptFX module

function prepareToPlay(sampleRate, blockSize)
{
	g_SAMPLERATE = sampleRate;
}

from there you can compare to the old value and create your own callback

[ustk]

@griffinboy @resonant Oh wait! Actually there's a broadcaster for this!

// Broadcaster definition
const var SamplerateChanged = Engine.createBroadcaster({
  "id": "SamplerateChanged",
  "args": ["sampleRate", "blockSize"],
  "tags": []
});

// attach to event Type
SamplerateChanged.attachToProcessingSpecs("");

// attach first listener
SamplerateChanged.addListener("", "md", function(sampleRate, blockSize)
{
	Console.print(sampleRate);
});

[resonant]

@ustk This is it, I will try this thanks!

[resonant]

By the way, attachToProcessingSpecs broadcaster also seems to get buffer size!

[ustk]

@resonant absolutely:

function(sampleRate, blockSize)
blockSize = buffer size