Experimenting with Web Audio

Hi, it’s me again with another experiment.
This time the experiment is about audio tools on the web, it has few real time audio visualizations; scope, spectrogram, spectrum, it also contains MIDI monitor tool, suitable for inspecting MIDI messages (works only on Chrome and Opera atm), Tap tempo, and a Signal Generator.
This experiment was on hiatus for a long time, since I had plans to add few more features to it and polish the existing stuff. However other projects have come a long, so I thought I might as well share this as it is now, even though it is slightly buggy (not optimized, cross browser support is lacking, responsive design is missing.).

audio-toolbox spectrogram visualizing Bremer/McCoy Hojt At Flyve

The experiment was done using Vue.js, vuex & vue-router, for the curious the source can be read here.

Check audio-toolbox out!

Vue’s reactivity through example

We wanted to create a landing page for our association; kolmekolmesata, so I created one: kolmekolmesata.com/.
You might like the site if you enjoy seeing bunch of SVG polygons appear and disappear over and over again, but you might not like it if you’re after information about our association, well you can’t please them all. In this brief post I’ll explain what I learned during the process.

The site was created with vue.js, and in this post I’ll briefly explain how the Vue’s reactivity system makes it so easy to declare a view like this:


and as a result see something like this:

How it works; so the template above declaratively defines the entire view. The value isToggled returns for each coordinate varies over time. So one might wonder how does Vue track the properties used in .isToggled()?

Well Vue’s documentation does no exceptions here, it is very good also on this subject matter.
The gist is that during the initializing of your component, Vue walks through your data object and defines getters and setters for each property.
Each component has a watcher, the watcher defines whether a property’s getter has been run during the execution of the template (or render method), if so the property is marked as “touched”. The watcher is also used when a setter is called for the touched property, the watcher then re-trigger the rendering of the component.

So in our case on the first render Vue notices that rendering these cubes uses a distanceToSweetSpot property, as every cube’s coordinate is compared to it.
In our app this distance is changed simply by assigning a new value to it every interval. Vue has defined the setter for the distanceToSweetSpot property with Object.defineProperty, the setter is executed every interval. When executing the setter it notifies the watcher that we’d want to re-trigger the templating function.

If you’re interested on the details of the site, feel free to read the source from the repository in github

CLR CTRL Experiment

This weekend I experimented with an interesting JS framework called Cycle.js, out of this experimenting I created a simple “app” for controlling color.

Of course for an app like this one could easily get away without framework’s, but it wasn’t the point of this, and we’re in Javascript-land where the use of frameworks can easily be justified.

Really enjoyed Cycle.js’ functional reactive style, and will probably be using it in the future.

If you want to turn your device’s screen to specific color, this is the app for you.
Go try it out.