Tag Archives: firefox

Berlin Web Audio Hack Day 2014

As with the Extensible Web Summit, we wrote some notes collaboratively. Here are the notes for the Web Audio Hackday!

We started the day with me being late because I took a series of badly timed bad decisions and that ended up in me taking the wrong untergrund lines. In short: I don’t know how to metro in Berlin in the mornings and I’m still so sorry.

I finally arrived to Soundcloud’s offices, and it was cool that Jan was still doing the presentations, so Tiffany gave me a giant glass of water and I almost drank it all while they finished. Then I set up my computer and proceeded to give my talk/workshop!

It was an improved and revised version of the beta-talk I gave at Mozilla London past past week:


Note to self: maybe remove red banners behind me if wearing a red shirt, so as not to blend with them
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Invest in the future: build for the web!

I spoke at GOTO Amsterdam a few weeks ago. I was really thrilled to be back in the Netherlands after so many years! So thanks to Sergi Mansilla, who curated the HTML5 track, and the organisation in general for bringing me there!

The talk wasn’t recorded, but I made a screencast just in case you really want to listen to me. I am also posting the outline/notes I wrote, and they differ in places because I don’t read them during the talk (I don’t even have them handy) and I sometimes went a bit off topic, but that’s the beauty of improvisation!

Here are the slides, and the slides source code just in case you wanted it too.

On to the notes-expect some MASSIVE GIFs and amazingly clever photomanipulation! tee hee hee!
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Inspecting the Web Audio Vocoder demo with Firefox’s new Web Audio inspector

I wanted to understand how the Web Audio Vocoder demo by Chris Wilson worked but I didn’t feel like reading the whole code upfront, so I decided to open it using the new Web Audio inspector that you can find in Firefox Nightly.

The Web Audio inspector will render a graph with all the nodes in the current Audio Context, so it’s ideal to get a feel for the vocoder’s internal structure.

And the structure is PRETTY COMPLEX, as you can see in this massive GIF:

web audio vocoder inspected with the web audio inspector in Firefox

Here’s the Vocoder code, just in case you want to read it too!

Full credits for the Audio Inspector go to Jordan Santell, also of Dancer.js fame! :-)

What have I been working on? (2014/02)

Looking at my todo.txt file, February has pretty much been my speaking-to-everyone month. I spoke to a lot of people from many different teams in Mozilla, and to a lot of people outside of Mozilla for interviews and conferences. Thankfully I also managed to sneak some coding time in it, and even some documenting time!
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Firefox now implementing the latest Custom Element spec

This week we saw bug 856140 Update document.register to adhere to the latest Custom Element spec fixed. So you can now do things such as declaring and instancing <fancy-button>s, which you couldn’t do with the previous implementation, because it would require your custom element’s name to start with an x-, following the old spec. Also, UI libraries such as Brick and other X-Tag based libraries won’t break because the callbacks are never called when web components are enabled. Those are all old bad nightmares from the past!

However the spec isn’t finalised yet–hence you can’t be done implementing something which hasn’t been written yet. And we need people to experiment with web components in Firefox and report bugs if they find them (you can file them under Product = Core, Component = DOM).

If you want to try this out, you can download a Nightly copy and follow the instructions in my Shadow DOM post to enable web components support (it’s disabled by default to prevent “breaking the world”, as Potch would put it).