Linux Audio Conference 2012
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Proceedings of the Linux Audio Conference 2012 April 12th - 15th, 2012 Center for Computer Research in Music and Acoustics (CCRMA), Stanford University, California 10111 11010 00110 101 111 11 0010111001001 01 01 100 100 00 1 01 01100101011 01 0 01 1 010 100 10 11 1 10 10 0111010 11 1 0 1 0 1 1110 001 01 10 1 0 10 01 10 10 1 1 0 0 1 0 1 00011001010 01 00 0 0 0 0 1 10 01 11 01 1 0 1 1 1 0 0 11 udio c 10 0 0 0 0 1 1 0 1 01 ux a onf 0 1 1 0 1 0 0 1 0 0 lin er 10 1 0 1 1 1 0 1 0 1 1000110 e 0 1 1 1 0 1 1 1 0 01 11 n 1 0 1 0 0 1 0 1 1 1 10 00 ce 1 0 0 0 1 0 1 1 10 c 1 1 0 1 0 1 0 0 1 01 en 0 2 0 0 1 0 1 0 1 1 0 11 te 1 0 0 0 1 0 1 r 0 0 0 0 1 0 0 1 1 1 1 1 010101 f 0 1 1 0 0 0 0 1 0 11 10 o 1 1 1 0 1 1 0 1 0 1 1 0 r 1 2 1 0 1 1 1 0 1 1 0 1 0 1 1 0 0 1 1 01011 0 c 0 0 0 0 0 0 0 01 0 o 0 0 0 0 1 1 0 1 1 0 1 01 1 0 1 1 1 1 1 0 1 1 0 m 0 1 0 1 0 0 1 1 0 10001 0 1 1 1 1 0 1 1 0 1 0 1 1 1 0 0 0 0 0 1 0 1 p 0 0 0 0 0 1 0 1 0 0 0 1 1 0 1 1 1 1 1 0 1 0 1 0 u 0 0 1 10010 1 1 0 1 1 1 0 0 0 1 1 0 1 0 0 1 0 1 1 0 1 t 0 0 0 1 0 0 1 0 0 1 1 1 0 0 1 1 1 0 1 1 0 e 1 1 0 1 1 0 0 1 1 1 0 0 0 1 0 0 1 1 1 0 0 1 1 1 0 1 0 1 0 1 1 r 1 1 0 0 1 1 1 0 0 1 1 1 0 0 1 0 0 0 0 1 0 0 1 1 01 0 0 1 0 1 1 0 r 1 1 1 0 0 1 1 0 0 0 1 1 1 1 0 1 0 0 0 1 0 1 0 0 1 0 e 0 0 0 1 1 1 1 1 0 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 1 0 1 0 0 1 s 0 0 1 1 1 0 1 1 1 1 0 1 0 1 1 1 0 0 1 1 1 0 1 1 1 0 1 1 e 0 1 1 0 1 1 1 0 0 0 0 1 1 1 0 1 0 1 1 0 1 1 1 1 0 1 1 0 0 0 0 a 1 0 1 0 1 0 0 0 1 0 0 0 1 1 1 1 1 1 0 0 1 1 0 1 0 1 1 1 0 r 1 1 1 1 1 0 1 1 1 0 0 1 0 1 1 1 1 1 0 0 0 0 1 0 1 0 0 c 0 1 0 1 1 0 0 1 1 1 a 0 0 1 0 0 0 1 1 0 0 1 1 0 h 1 1 1 1 1 1 0 0 0 0 1 1 s 1 1 0 1 0 0 1 0 1 0 0 1 1 1 1 0 1 0 1 1 0 0 1 1 1 0 1 1 0 1 0 1 i 1 u 0 0 1 0 0 0 1 0 0 1 0 1 1 1 0 n 1 1 0 0 1 1 1 0 1 1 0 0 1 0 0 , 0 1 1 0 1 1 1 1 0 1 0 0 1 0 1 1 0 1 1 1 0 1 1 1 1 1 0 0 m 0 0 a 1 0 1 1 0 0 1 1 1 1 0 0 1 0 0 0 1 0 1 1 1 0 0 0 1 0 0 c 0 0 0 1 0 0 1 0 0 1 0 u 0 1 0 1 1 0 1 1 0 1 1 0 0 , 0 0 0 0 0 1 0 0 0 1 0 s 1 1 1 0 1 0 1 1 0 1 0 0 0 0 y 0 0 0 1 1 1 1 0 0 1 i 0 1 0 t 1 0 0 0 1 0 c 0 0 1 1 1 1 1 0 i 1 1 0 1 0 1 0 0 1 0 1 1 0 0 1 0 1 0 1 1 0 1 0 0 s 0 a 0 1 0 0 1 0 1 1 1 1 0 1 r 0 0 0 1 n 1 0 1 0 0 0 1 0 1 1 1 0 1 1 1 0 1 0 0 d e 0 1 1 1 0 0 1 1 0 1 1 0 1 0 0 1 1 0 1 v 1 1 1 0 a 0 0 0 i 1 0 0 1 0 0 0 1 0 c 1 1 1 1 0 0 1 1 1 1 1 1 o 0 1 n 0 0 1 1 0 1 0 u 0 1 1 1 0 0 0 0 u s 1 1 0 0 t 1 0 0 i 0 1 1 1 0 c 0 0 s 1 0 0 0 1 1 1 1 0 0 d 0 1 1 0 1 1 0 0 r 1 0 0 1 1 1 1 1 1 0 1 0 0 1 0 o 1 1 1 1 1 0 0 f 0 1 0 1 0 0 0 0 1 1 0 1 1 n 0 1 1 1 0 1 0 0 0 0 a 1 1 0 1 1 1 t 1 1 0 1 0 0 1 s 0 1 0 1 1 1 1 0 0 0 0 1 0 0 1 0 1 1 1 0 1 0 0 1 0 1 1 1 1 0 1 1 0 1 1 1 1 0 1 0 0 0 0 0 0 0 1 1 0 1 0 1 1 1 0 1 0 0 1 0 1 1 1 0 1 0 1 0 1 1 1 0 1 0 0 1 0 0 1 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 1 0 1 1 0 Published by CCRMA, Stanford University, California, US April 2012 All copyrights remain with the authors http://lac.linuxaudio.org/2012 ISBN 978-1-105-62546-6 Credits Cover design: Fernando Lopez-Lezcano Layout: Frank Neumann Typesetting: LATEX and pdfLaTeX Logo Design: The Linuxaudio.org logo and its variations copyright Thorsten Wilms c 2006, im- ported into the "LAC 2012" logo by Robin Gareus Thanks to: Martin Monperrus for his webpage "Creating proceedings from PDF files" Printed in the US ii Partners and Sponsors CCRMA Linux Weekly News The Fedora Project SICa Stanford University LinuxAudio.org CiTU iii iv Foreword Stanford, California, March 2012 A long time ago in a country far far away, a group of Linux Audio enthusiasts got together at LinuxTag 2002 in Karlsruhe/Germany, organized a Linux Audio Developers Booth there, and plotted future plans. Little they knew (or perhaps they did?) that their initiative would have staying power and rally new people from all over the world every year. Today, the Linux Audio Conference celebrates its 10th anniversary being hosted in the United States for the first time. Read the whole story and look at the pictures at http://lac.linuxaudio.org, and you will see that most of those early enthusiasts are still around, as well as new ones that have been joining us every year. We at Stanford University’s Center for Computer Research in Music and Acoustics (CCRMA, pronounced “karma”) are very happy to be the hosts of LAC 2012. Bear with me as I tell you a bit of our history. CCRMA has been using and sharing Free Software as part of a collaborative en- vironment for research and the arts since its beginning in the early 1970’s. Mainframes were the only game in town and computer time for making music and creating new sound algorithms was so valuable that, at the beginning, it could only be borrowed at night in the Artificial Intelligence Lab at Stanford. Eventually CCRMA had its own shared computing monster and similarly-sized digital synthesizer (we called it the Samsom Box), and much music and research came out of them. But in time, mainframes, minicomputers, and mammoth synths withered away and gave way around 1990 to a network of nimble NeXT computers and pure software sound making (with Unix under the hood!, alas, not a free and open hood...).