Remove hint.html and index.html
As per discussions on GitHub the index.html and hint.html files should be deleted in favour of README.md files (from any .text/.txt/.markdown/.md files which will be turned into README.md in an upcoming commit).
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta name="GENERATOR" content="mkd2html 2.1.3 DL=DISCOUNT">
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
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<link rel="stylesheet"
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type="text/css"
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href="../hint.css">
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<title>Most sound</title>
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</head>
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<body>
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<h1>Most sound</h1>
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<p>Daniel Vik<br>
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802 Durshire Way<br>
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Sunnyvale, Ca 94087<br>
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<a href="mailto:daniel@vik.cc">daniel@vik.cc</a><br>
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<a href="http://www.danielvik.com">http://www.danielvik.com</a></p>
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<h2>Judges' comments:</h2>
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<h3>To build:</h3>
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<pre><code>make vik
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</code></pre>
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<h3>To run:</h3>
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<pre><code>./vik file.mod > audio_file.raw
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</code></pre>
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<h3>Try:</h3>
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<pre><code>./vik randowan.mod | mplayer -demuxer rawaudio -
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./vik mad_world.mod | mplayer -demuxer rawaudio -
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</code></pre>
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<p>Alternatively, you can use</p>
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<pre><code>./vik file.mod > file.raw; ./raw2wav file.raw > file.wav
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</code></pre>
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<p>It is possible to download a number of Mod files from <a href="http://modarchive.org">The Mod Archive</a>.</p>
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<p>The randowan.mod and mad_world.mod files were created by
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<a href="http://www.translucentboy.com">Henrik Bertilsson</a> and
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are included with his permission.</p>
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<h3>Selected Judges Remarks:</h3>
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<p>This entry converts .MOD audio files to a playable stream
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in a most pleasing manner if you don’t like tremolo or vibrato.</p>
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<p>Also it abuses the C compiler and/or assembler with a partially
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initialized 32 MByte array. Can you tell what is that partial
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initilzation for?</p>
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<p>Does it take your system a long time to compile? You may want to do try:</p>
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<pre><code> cc -S vik.c
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</code></pre>
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<p>and to examine the resulting assembly file vik.s. On some platforms
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the assembly file is about 128 MBytes in size!</p>
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<h2>Author’s comments:</h2>
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<h1>Introduction</h1>
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<p>In 1987, Karsten Obarski changed the way music was handled in games and
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demos with the introducton of the MOD file format on Commodore Amiga.</p>
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<p>A MOD file contains a set of samples, a number of patterns indicating
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how and when the samples are to be played, a list of what patterns to
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play in what order, and a number of effects.</p>
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<h1>Features</h1>
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<p>This program converts MOD files created with the standard trackers for
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Amiga, e.g. Pro Tracker, Noise Tracker and Sound Tracker to raw 16 bit
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44.1kHz stereo audio. The program supports MOD music with 4, 6, and 8
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channels MOD files with up to 31 samples.</p>
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<p>The MOD format includes many effects for each audio channel and this
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program supports most of them, including:</p>
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<ul>
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<li>Arpeggio</li>
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<li>Slide and fine slide up/down/to note</li>
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<li>Set sample offset</li>
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<li>Volume slide</li>
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<li>Pattern break</li>
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<li>Filter on/off</li>
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<li>Set volume</li>
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<li>Cut sample</li>
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<li>Delay sample</li>
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<li>Delay pattern</li>
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<li>Set speed</li>
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</ul>
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<p>Due to size constraints tremolo and vibrato is not supported. Also, to
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avoid infinite long songs, the position jump feature is ignored.</p>
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<h1>Songs</h1>
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<p>With his permission, the package incldues two songs composed by Henrik
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Bertilsson, also known as Deelite:</p>
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<ol>
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<li> Mad World</li>
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<li> Randowan</li>
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</ol>
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<h1>Build</h1>
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<p>Compiling for *nix systems (including cygwin) is straight forward:</p>
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<pre><code>$ gcc -o vik vik.c
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</code></pre>
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<h1>Usage</h1>
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<h3>Convert MOD file to raw 44.1kHz stereo audio file</h3>
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<pre><code>$ ./vik mad_world.mod > audio_file.raw
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</code></pre>
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<h3>Listen to the MOD file (streaming to mplayer)</h3>
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<pre><code>$ ./vik randowan.mod | mplayer -demuxer rawaudio -
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</code></pre>
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<p>(Don’t forget the last ‘-’ as it makes mplayer read from stdin.)</p>
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<h1>Obfuscation</h1>
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<p>The IOCCC rules did not put a limit on the entropy of the source code,
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and it appears that the general entropy rules doesn’t apply. An estimate
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is that the code density entropy of this entry is ~1.2 which means that
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there are around 2500 characters of code carrying information, yet there
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are only 2037 IOCCC characters of actual code. Most of the additional
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characters are encoded with non-counting characters in the frequency
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table. But there are also ~50 or so white space characters spread out
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through the source code that carry information.</p>
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<p>The use of macros certainly adds to the obfuscation but the reason for
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using them is mainly to fit as many features as possible within the size
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limits. So please excuse the use of them.</p>
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<p>Once the preprocessor is run, the code gets more interesting. The MOD
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player is basically a register based state machine and all the magic is
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hidden in a fog of short statements. Many of the register updates are
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conditional and the program uses the ? operator (sigh) mainly to save
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space, but also to leverage the comma operator and precedence more
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efficiently.</p>
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<h1>Portability</h1>
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<p>The progam is portable to most platforms. The only system dependency is
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that the program relies on writing binary data to stdout.</p>
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<p>Microsoft compilers adds a carriges return to newlines, and to compile
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the program with this platform, the following line can be added after
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the main declaration in order for the program to run correctly:</p>
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<pre><code>_setmode(_fileno(stdout), 0x8000);
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</code></pre>
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<h1>Limitations</h1>
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<p>The program only runs when a valid MOD file is passed as argument. If
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no argument is passed, the program crashes.</p>
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<hr />
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<TABLE><TR>
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<TD><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a></TD>
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<TD><P>© Copyright 1984-2012,
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<A HREF="/judges.html">Leo Broukhis, Simon Cooper, Landon Curt Noll</A>
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- All rights reserved<BR>
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This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</P></TD>
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</TR></TABLE>
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</body>
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</html>
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