Audio Sounds Music

Audio Sounds Music

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flowchart TD
  ctrl["Controls menu keys 1-4"] --> snd["Sounds -$79B0"]
  ctrl --> beep["Walk Beep -$79AF"]
  beep --> step["step/turn -$7E42(0)"]
  snd --> sfx["-$7E42 ids 1..9"]
  step --> doc58["see Amiga-Audio-In-Exe"]
  sfx --> doc58

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Player-facing toggles for MM2 Amiga audio. Sound data, sequences, title theme, and remake playback live in 58-amiga-audio-in-exe.md — start there.

[TOC]

Player-facing controls

The in-game Controls menu (title string Controls in the code hunk) exposes four toggles keyed 1–4 (0x31–0x34). Handler cluster around 0x13DEC in mm2.capstone.asm:

Key	Option	Runtime byte (A4)	Behaviour
1	Sounds	-$79B0 ($8650)	Toggles bit 0 (bchg @ 0x13F6C) — master SFX on/off (gates play_sound_seq ids 1..9)
2	Walk Beep	-$79AF ($8651)	Toggles bit 0 (bchg @ 0x13F78) — footstep click (gates seq id 0)
3	Disposition	-$79AE ($8652)	Cycles 0…3 (addq @ 0x13F84, wraps at 3) — AI mood label from table A4-$6D70
4	Delay	-$79AD ($8653)	Cycles 0…9 (addq @ 0x13F9A, wraps at 9) — text/animation pacing

Menu copy (code hunk ~0x14026):

Controls
1) Sounds       /
2) Walk Beep    /
3) Disposition:
4) Delay
Press 1-4 to toggle
ON / OFF

-$83F8 prints the current ON/OFF or disposition line; -$839E prints delay as a decimal digit ('0'..'9' + 0x30).

How SFX fire (corrected)

Event	Call	Notes
Party step / turn	JSR -$7E42(A4) with id 0	play_sound_seq @ 0x6FB8 — Walk Beep
UI / combat / menus	-$7E42 with id 1..9	Same routine; Sounds gate
Event scripts	OP_0D → -$7E42(index)	See 07-event-script-opcodes.md
Title attract	Overlay 0x283FC → -$7E24	Title theme stream (not seq 0..9)

Remake: mm2::audio::playSoundSeq / playTitleTheme (AudioSDL.cpp).

Sample channel names

Embedded labels (code hunk 0x6F88): Audio zero … Audio eight — diagnostic labels for audio.device channels, not DOS filenames. Driver string audio.device nearby (0x72B6).

Related globals

A4 offset	Role
-$79B0	Sounds enabled (bit 0)
-$79AF	Walk beep enabled (bit 0)
-$79AE	Disposition index 0–3
-$79AD	Delay index 0–9

See also

• 58-amiga-audio-in-exe.md — authoritative Paula / DATA / remake
• 43-exploration-input-and-ingame-options.md — Controls panel entry
• 01-startup-init.md — overlay audio init thunks

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See also

Page	Why
Amiga Audio In Exe	Paula / DATA / remake — start here
Exploration Input and Options	Controls panel entry
RE Tools	Audio export scripts