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samer@0: \title{Information Dynamics Installation\\Pattern and Predictability in Music}
samer@0: \author{Samer Abdallah and Henrik Ekeus}
samer@0: \begin{document}
samer@0: \maketitle
samer@0: One of the noticable features of most sorts of music is that it
samer@0: involves patterns in time---a repeating bass line, the cycle of
samer@0: harmonies in a 12 bar blues, a melodic theme that is repeated, perhaps
samer@0: in slightly different forms, at different pitches or at different speeds, and so on.
samer@0: One of the tools available to a composer or performer is to play
samer@0: with his or her audience's expectations, by setting up patterns that
samer@0: seem more or less predictable, sometimes doing what listeners expect,
samer@0: and sometimes doing surprising things.
samer@0: 
samer@0: Our work on \emph{information dynamics} involves studying several
samer@0: different kinds of predictability in musical patterns, how we as
samer@0: human listeners might perceive these, and how they shape or affect
samer@0: the listening experience.
samer@0: 
samer@0: This installation allows participants to explore a space of melodic
samer@0: and rhythmical patterns organised by \emph{how predictable} they are,
samer@0: at least according to a simple model of how one might guess the next
samer@0: musical event given the previous one.
samer@0: Each person in the space generates one instrumental line, at a certain speed
samer@0: and using a certain pitch range. 
samer@0: 
samer@0: \subsection*{Moving around}
samer@0: As you enter the space, the system will start generating an instrumental
samer@0: line or voice.  The loudness of your voice is linked to your height,
samer@0: so if you crouch, you will become quiet. The active space is triangular,
samer@0: with each corner corresponding to three different extremes of predictability/unpredictability.
samer@0: As you move around, the system will generate patterns corresponding to
samer@0: where you are in the space. With other people in the space, you can 
samer@0: cooperate to create polyhonic textures, for example, you could lay down
samer@0: a predictable repeating ostinato or bass line while your companion can
samer@0: generate a freer melodic line on the off-beats.
samer@0: 
samer@0: \begin{center}
samer@0: \hangbox{\includegraphics[width=0.48\linewidth]{triangle.pdf}}
samer@0: \quad\hangbox{\begin{minipage}{0.4\linewidth}
samer@0: \vspace{1em}
samer@0: \textbf{Tip}\quad It's best not to move around too quickly, to give yourself
samer@0: time hear the pattern you are generating to notice its characteristics.
samer@0: Then you can decided if you like it or want to try somewhere else.
samer@0: If you move around quicky, the patterns will change so quickly that there
samer@0: will effectively \emph{be no pattern}.
samer@0: \end{minipage}}
samer@0: \end{center}
samer@0: 
samer@0: 
samer@0: \subsection*{Control gestures}
samer@0: \def\out{in$\rightarrow$ out}
samer@0: \def\in{out$\rightarrow$ in}
samer@0: Control gestures are made pushing out or pulling in your left and right
samer@0: arms rapidly, either separately or together (while facing the Kinect
samer@0: motion tracker; if you face away, then left and right are reversed).
samer@0: 
samer@0: It should be noted that the system will sometimes detect gestures when
samer@0: none was intended. In particular, you might find the timing of your voice
samer@0: goes wild if you walk around quickly. In this case, the \textbf{(\in,\in)}
samer@0: gesture will reset your voice to the initial tempo and on the beat.
samer@0: \begin{center}
samer@0: \begin{tabular}{lll}
samer@0: 	\textbf{left arm} & \textbf{right arm} & \textbf{meaning} \\
samer@0: 	\hline\\
samer@0: 	\out & static in & double tempo \\
samer@0: 	\in  & static in & halve tempo \\
samer@0: 	static in  & \out & triple tempo \\
samer@0: 	static in  & \in & one-third tempo \\
samer@0: 	\out & static out & shift by half-beat \\
samer@0: 	\out & \out & change instrument \\
samer@0: 	\in  & \in & reset tempo 
samer@0: \end{tabular}
samer@0: \includegraphics[angle=90,width=\linewidth]{gestures-2.pdf}
samer@0: \end{center}
samer@0: 
samer@0: \end{document}




