#Chrome mudic lab code
We’re also providing open-source code so that others can build new experiments based on what we’ve started.Įxploring music can help spark curiosity in all kinds of ways. Just like today’s Clara Rockmore doodle, the experiments are all built with the Web Audio API, a freely-accessible, open web standard that lets developers create and manipulate sound right in the browser. Chrome Music Lab is all built for the web, so you can start playing instantly, whether you’re on a tablet, phone, or laptop. You can play with sound, rhythm, melody, and more. It’s called Chrome Music Lab, and you can check it out at g.co/musiclab. We built a set of experiments that let anyone explore how music works. Some pre-calculations make it as easy as possible to create nice-sounding compositions.This year, for Music in Our Schools Month, we wanted to help make learning about music a bit more accessible to everyone by using technology that’s open to everyone: the web. The recognition is still not 100% accurate, however for a fun little app like this, it’s perfectly suited. Comparing the simplified line shaved many milliseconds from the total computation time. A bunch of sample gestures for each shape in each direction are stored and then called for comparison.Īs a user draws his line, the line is simplified, compared against the library samples, and then smoothed to create the final form. We used a library called Dollar Gesture Recognizer to achieve this. When the user draws a circle or triangle, the program recognizes the shape and applies a unique sound and effect. Once back to the main thread, the geometry of the line is updated with new data - ready to draw on the next animation frame! Gesture recognition While it’s animating, the co-ordinates are all flattened into a Float32Array which is passed back to the main thread at lightning speed thanks to transferable objects in WebWorkers. When a shape plays a sound, the points are scaled up and snap back to their original position with a spring physics calculation. Inside the WebWorker, we maintain the state of each shape in the form of a Vector object with X and Y co-ordinates for each point that is drawn as part of the shape. We handled this by moving the physics math off of the main thread into a WebWorker.
#Chrome mudic lab series
For Kandinsky however, each line is stored as a separate mesh, made up of a series of points and attached to a WebGL scene.īelow you can see a wireframe example of the resulting mesh.Ī big challenge in calculating a large number of interactive objects at once is trying to render the animations consistently at 60fps on every supported device. In regular drawing applications, the canvas is stored as pixel data and the pixels are manipulated for every stroke. Our final build uses WebGL to draw lines that are calculated and rendered on the GPU, resulting in a very smooth, dynamic and addictive experience. The second iteration used WebGL and turned lines into geometry by triangulation, which worked and was fast but gave us limited control over the look of the line. We started using HTML5 canvas to draw lines every frame, which was too slow. Check it out at Chrome Music Experiments. It was a collaboration with our friends at Google Creative Lab where we explored a bunch of different possibilities by sketching through code.
This article describes the tech behind the experience. Some shapes even smile and sing back at you.
Users doodle, scribble or draw on a web canvas and hit play to listen to their art work. Kandinsky lets you make music through art.
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