Comments on: Acid sketching

By: Alex

Alex — Thu, 10 Mar 2011 23:45:11 +0000

Hi Badiou,

I haven’t used openframeworks a great deal and don’t use macs, but for the missing ofx headers I’d suggest making a new openframeworks project, adding the opencv plugin and copying the code from my project across.

The boost library is not part of openframeworks and you’ll have to install that separately:
http://www.boost.org/

Hope that helps,

By: badiou

badiou — Thu, 10 Mar 2011 23:38:02 +0000

Hi,
I just begin OpenFrameworks and discovered this application. That seems great although I didn’t get to make this work. I’m a mac user and I think I have a problem with several libraries like boost or ofxCvMain.h or “ofxDirList.h or boost/lambda/lambda.hpp
(it isn’t included in your zip file?)

Many thanks for your help, maybe my question or difficulties are really easy but I don’t get everything.

By: Amy

Amy — Wed, 03 Nov 2010 23:55:36 +0000

Nice Alex! I especially like how you’ve unlocked the hidden musical potential of the Happy Face. :)

By: Visualisation of Live Code « Alex McLean

Visualisation of Live Code « Alex McLean — Sat, 29 May 2010 20:22:40 +0000

[...] TurTan inspired a system by Alex McLean and introduced here, with the working title of Acid Sketching. In Acid Sketching, a sound is specified simply by drawing a shape, where morphological measurements are mapped to parameters of an acid bassline synthesiser. The area of a shape is mapped to pitch, its regularity (perimeter length vs area) mapped to envelope modulation, and relative angle of central axis mapped to resonance. Several such shapes are drawn in an arrangement, where a minimum spanning tree of their centroids is taken as a polyphonic sequence, where distance equals relative time. Feedback may be projected back on to the drawing surface, so shapes flash red as they are triggered. A static figure would not make this clearer, however illustrative video is available online at http://yaxu.org/acid-sketching/. [...]

By: Alex

Alex — Mon, 04 Jan 2010 15:08:35 +0000

Thanks Evan.. In theory you should get intricate sequences with lots of warbling 303 glides, although as soon as two blobs a connected with a line they are treated as a single blob. In practice there are bugs and the more blobs there are, the more get missed out of the sequence for some reason…
Must return to this sometime soon

By: pixelpusher

pixelpusher — Mon, 04 Jan 2010 15:03:40 +0000

rad, dude. a nice concept. what happens with really dense drawings?

By: dave’s blog of art and programming | Groworld at dorbotlondon

dave’s blog of art and programming | Groworld at dorbotlondon — Tue, 15 Dec 2009 17:17:59 +0000

[...] also be good to see what Sarah Angliss has been doing lately with robotics, Alex’s acid sketching and the other good stuff being [...]

By: Douglas

Douglas — Sun, 08 Nov 2009 23:45:05 +0000

Ha, lots of great graphical score stuff in the 1950s, like Earl Brown’s classic “December 1952″:

http://www.chelseaspace.org/archive/december1952-pr.html

I love the casual way you manipulate the drawings Alex, the way a gesture’s meaning can change and you can connect previously disconnected shapes, distort the drawing, etc. Having the red balls bouncing around really opens up possibilities as well. You’ve probably seen this oldy but goody:

http://balldroppings.com

By: Alex

Alex — Sun, 08 Nov 2009 21:13:25 +0000

Hey Graham, symbols are geometric drawings aren’t they? :) But it’s not doing any grapheme detection or anything like that, the computer finds meaning in the shapes.

Yep Jamie I think this approach has a lot of promise, which means it’s probably all been done before, probably in the 50s, documented on a lot of fanfold paper in the attics of forgotten geniuses. Got anything in particular in mind?

By: Jamie Bullock

Jamie Bullock — Sun, 08 Nov 2009 19:50:12 +0000

I love the idea of drawing to make sound.

Seeing your experiment has got me thinking about a load of possibilities. Nice work.