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declare name "Noise";
declare version "1.1";
declare author "Grame";
declare license "BSD";
declare copyright "(c)GRAME 2009";
//-----------------------------------------------------------------
// Noise generator and demo file for the Faust math documentation
//-----------------------------------------------------------------
<mdoc>
\section{Presentation of the "noise.dsp" Faust program}
This program describes a white noise generator with an interactive volume, using a random function.
\subsection{The random function}
The \texttt{random} function describes a generator of random numbers, which equation follows. You should notice hereby the use of an integer arithmetic on 32 bits, relying on integer wrapping for big numbers.
<equation>random</equation>
\subsection{The noise function}
The white noise then corresponds to:
<equation>noise</equation>
</mdoc>
random = +(12345)~*(1103515245);
noise = random/2147483647.0;
<mdoc>
\subsection{Just add a user interface element to play volume!}
Endly, the sound level of this program is controlled by a user slider, which gives the following equation:
<equation>process</equation>
</mdoc>
<mdoc>
\section{Block-diagram schema of process}
This process is illustrated on figure 1.
<diagram>process</diagram>
</mdoc>
process = noise * vslider("Volume[style:knob]", 0, 0, 1, 0.1);
<mdoc>
\section{Notice of this documentation}
You might be careful of certain information and naming conventions used in this documentation:
<notice/>
\section{Listing of the input code}
The following listing shows the input Faust code, parsed to compile this mathematical documentation.
<listing/>
</mdoc>