Hi guys

Thought I'd let you know I've rewritten ChucKJS to work in a sample accurate way. To make this work, I had to forego Web Audio API's built-in nodes, e.g. oscillators, and write everything from scratch. So far I've only implemented a sine oscillator, but that's all I need for my current examples anyway :) To be able to generate sound sample by sample, I've used the ScriptProcessorNode interface, which allows you to register a callback in which you can write to its output buffers.

This approach, with generating every sample in JavaScript, is probably horrible for performance, but it's the only option I can see for re-implementing ChucK properly. Hopefully, the performance is good enough for demonstration purposes.

So far, I've got three examples for you to try, examples/example1.html, examples/example2.html and examples/basic/demo0.html. Make sure you build ChucKJS first (as described in the README), as the examples are generated. I'm planning on porting more of ChucK's own examples as time permits. Also playing with the idea of making a dedicated site for the project (via GitHub Pages), where the examples are displayed.

Would love some feedback on the current state of affairs!

Best,

Arve

On Fri, Dec 27, 2013 at 2:36 AM, Arve Knudsen <arve.knudsen@gmail.com> wrote:

Hi guys

I've begun work on a JavaScript (well, CoffeeScript) implementation of ChucK, ChucKJS, for which I'm seeking feedback from ChucK developers in particular. Web Audio API is used to produce sound. Very little of the language is implemented so far, I've just today finished end-to-end support (including a VM) for playing back a sine tone for a certain interval of time as in the following program:

SinOsc sin => dac;
2::second => now;

Even though this may seem minor, I'm pretty happy that this is at all possible just from within the browser :) As explained in the project's README, there is a self-contained example (examples/example1.html) which demonstrates the aforementioned sine wave playback capability.

What do you guys think, are anyone else interested in being able to run ChucK programs in the browser? Anyone interested in helping out on ChucKJS (like ChucK it's GPL licensed)?

My motivation for writing ChucKJS is to develop an online development environment for ChucK where one can execute the programs directly in the browser, I figure this will lower the threshold and make the language more fun to work with.

Merry Christmas,
Arve