i'm working on an offsite project that can generate audio using lists, and i need to make an extension that can play those lists as audio. i know how to get the list as an argument, but i'm having trouble finding a method to play sound that will work with scratch. i'm also unsure what method the “play sound” blocks use. any ideas?

https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API
https://developer.mozilla.org/en-US/docs/Web/API/AudioBuffer#example
TL;DR seems the result of getChannelData is mutable.

ametrine_ wrote:

i'm also unsure what method the “play sound” blocks use.

You would need to do something slightly different given when Scratch plays a sound, it's from a preexisting file rather than just a list of samples (of amplitude). But playing is exactly the same.

You can look at the code for scratch-audio; it's not very long (SoundPlayer.js actually makes an AudioNode and plays sounds, and AudioEngine.js has code for making AudioBuffers to be played)