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30 Jul 2014 oubiwann   » (Journeyer)

OSCON 2014 Theme Song - Andrew Sorensen's Live Coding Keynote

Andrew Sorensen live-coding at OSCON 2014
Keynote

Shortly after Andrew Sorensen began the performance segment of his keynote at OSCON 2014, the #oscon Twitter topic began erupting with posts about the live coding session. Comments, retweets, and additional links persisted for that day and the next. In short, Andrew was a hit :-)

My first encounter with Andrew's work was a few years ago when I was getting back into Lisp. I was playing with generative music with Overtone (and then, a bit later, experimenting with SuperCollider, Hy, and Twisted) and came across his piece A Study in Keith. You might want to take a break from reading this port and watch that now ...

When Andrew started up his presentation, I didn't immediately recognize him. In fact, when the code was displayed on the big screens, I assumed it was Clojure until I looked closely and saw he was using (define ...) and not (defun ...).  This seemed very familiar, and then I remembered Impromptu, which ultimately lead to my discovery of Extempore (see more links below) and the realization that this is what Andrew was using to live code.

At the end of the performance a bunch of us jumped up and gave a standing ovation. (In fact, you can hear me yell out "YEAH" at the end of his presentation when he says "And there we go."). It was quite a show. It seemed the OSCON 2014 had been given a theme song. The next step was getting the source code ...


Andrew's gist (Dark Github Theme)
Sharing the Code

Andrew gave a presentation on Extempore in the ballroom right after the keynote. This too was fantastic and resulted in much tweeting.

Afterwards a bunch of us went up front and chatted with him, enthusing about his work, the recent presentation, the keynote, and his previously published pieces.

I had Andrew's ear for a moment, and asked him if he was interested in sharing his keynote source -- there had been several requests for it on Twitter (that also got retweeted and/or favourited). Without hesitation, he gave an enthusiastic "yes" and we were off and running for the lounge where we could sit down to create a gist (and grab a cappuccino!). The availability of the source was announced immediately, to the delight of many.


Setting Up Extempore

Sublime Text 3 connected to Extempore
Later that night in my hotel room, I had time to download and run Extempore ... and discovered that I couldn't actually play the keynote code, since there was some implicit setup I was missing. However, after some digging around on the docs site and the mail list, music was pouring forth from my laptop -- to my great joy :-D

To ensure anyone else who is not familiar with Extempore can also have this pleasure, I've put together the all the prerequisites and setup necessary in a forked gist, in multiple parts. I will go through those in this blog post. Also: all of my testing and live coding was done using Ben Swift's Extempore Sublime Text plugin.

The first step is getting all the dependencies. You'll want to start the downloads right away, since they are large (the sample files are compressed .wavs). While that's going on, you can install Extempore using Homebrew (this worked for me on Mac OS X with no additional tweaking/configuration necessary):

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