From 46227e2003de28202cc4e82bca4f7f4745476c4e Mon Sep 17 00:00:00 2001
From: Alexander Kassouni <alex@kassouni.net>
Date: Sat, 5 Sep 2026 17:51:13 -0700
Subject: init

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+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>Animalese pipeline — Animal Crossing (GC)</title>
+<link rel="stylesheet" href="style.css">
+</head>
+<body>
+
+<h1>Animalese: the text&nbsp;→&nbsp;speech pipeline</h1>
+<p class="lede">How <em>Animal Crossing</em> (GameCube, <code>GAFE01</code>, USA rev&nbsp;0) turns a
+message string into villager babble. Every claim here is traced to a function in the
+<a href="https://github.com/Prakxo/ac-decomp">ac-decomp</a> tree.</p>
+
+<h2>The short version</h2>
+
+<pre>
+message text  (game charset, 1 byte/char)
+  │
+  │  1. mMsg_sound_voice_get()            256-entry table
+  ▼     char code ──► voice code (0x53–0x86)
+gating + voice selection
+  │  2. mMsg_sound_voice_mode_get()       animalese / click / silent
+  │     mNpc_GetNpcSoundSpec()            speaker ──► spec 2–9
+  ▼     Na_SpecChange()                   spec ──► sequence 243/244/245
+windowing
+  │  3. mMsg_sound_voice_entry()          collect (a, b, c) over two cursor steps
+  ▼     ~1 character per 2 game frames
+draw-time trigger
+  │  4. mFontSentence_animal_voice_se()   glyph scale ──► volume
+  ▼     sAdo_VoiceSe(a, b, c, npc, scale, mode)
+phonology
+  │  5. Na_VoiceSe()                      digraphs, long vowels, silent e
+  ▼     ──► phoneme code 0x01–0x77
+playback
+  │  6. Sou_VoiceStart()                  write port 0 of a JAudio2 subtrack
+  │     sequence dyntbl ──► instrument (code − 1)
+  ▼  7. ProgToVp(bank, inst) ──► NoteToVoice() ──► smzwavetable
+DSP  ──►  one ~190 ms VADPCM sample, 22050 Hz
+</pre>
+
+<p>A phoneme code is literally a <strong>soundfont instrument number plus one</strong>. The whole
+"engine" is a lookup table with about fifty special cases; the character comes almost
+entirely from the samples.</p>
+
+<h2>Pages</h2>
+
+<ul class="toc">
+  <li><a href="gating.html">1. Gating &amp; voice selection</a>
+    <span>When animalese plays at all, and which of the three voices you hear.
+    Specs 2–9, the click fallback, and the player's own voice.</span></li>
+
+  <li><a href="encoding.html">2. Text → voice code</a>
+    <span>The game's character set, the 256-entry voice table, case folding,
+    accent folding, and the eight punctuation codes.</span></li>
+
+  <li><a href="scheduling.html">3. Windowing &amp; timing</a>
+    <span>How three characters get bundled into one call, why it fires from the
+    font renderer, and the every-other-frame cursor.</span></li>
+
+  <li><a href="phonology.html">4. The phonology engine</a>
+    <span><code>Na_VoiceSe</code> in full: the 55-entry digraph table, short/long
+    vowel tables, silent&nbsp;e, magic&nbsp;e, and punctuation flush.</span></li>
+
+  <li><a href="playback.html">5. Playback</a>
+    <span>Sequences, banks, the two alternating subtracks, per-spec timbre,
+    the emotion LFO, and the deferred second syllable.</span></li>
+
+  <li><a href="soundfont.html">6. The soundfont lookup</a>
+    <span>Sequences, banks and instruments as data: the four archive tables, the
+    bank blob, load-time relocation, and where the PCM actually lives.</span></li>
+
+  <li><a href="editor.html">7. The editor path</a>
+    <span>Mode&nbsp;1 — an undocumented third calling convention that bypasses
+    phonology entirely, and what it says about samples 0x53–0x76.</span></li>
+
+  <li><a href="quirks.html">8. Quirks, dead code &amp; corrections</a>
+    <span>The dead volume store, the tautological dedup, vestigial mouth-shape
+    tracking, and corrections to earlier notes.</span></li>
+
+  <li><a href="reference.html">9. Reference tables</a>
+    <span>Everything in one place: voice codes, digraphs, phoneme tables,
+    control codes, source line index.</span></li>
+</ul>
+
+<h2>Scope</h2>
+<p>These pages document the <em>runtime</em> pipeline as decompiled. Extracting the
+actual audio samples from a disc image is covered separately in
+<code>../extraction.md</code>, which also carries the audio table-of-contents,
+bank/sample formats, and VADPCM decoding notes.</p>
+
+<div class="note">
+<strong>No game assets here.</strong> Everything on these pages is derived from decompiled
+source. Reproducing audible animalese needs a legally dumped copy of the game.
+</div>
+
+<p class="src">Verified against ac-decomp at commit <code>09ca8e8b</code> (DOL and REL 100 % linked).</p>
+
+</body>
+</html>
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