Game Audio Principles
Sound design and music integration for immersive game experiences.
- Audio Category System
Category Definitions
Category Behavior Examples
Music Looping, crossfade, ducking BGM, combat music
SFX One-shot, 3D positioned Footsteps, impacts
Ambient Looping, background layer Wind, crowd, forest
UI Immediate, non-3D Button clicks, notifications
Voice Priority, ducking trigger Dialogue, announcer
Priority Hierarchy
When sounds compete for channels:
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Voice (highest - always audible)
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Player SFX (feedback critical)
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Enemy SFX (gameplay important)
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Music (mood, but duckable)
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Ambient (lowest - can drop)
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Sound Design Decisions
SFX Creation Approach
Approach When to Use Trade-offs
Recording Realistic needs High quality, time intensive
Synthesis Sci-fi, retro, UI Unique, requires skill
Library samples Fast production Common sounds, licensing
Layering Complex sounds Best results, more work
Layering Structure
Layer Purpose Example: Gunshot
Attack Initial transient Click, snap
Body Main character Boom, blast
Tail Decay, room Reverb, echo
Sweetener Special sauce Shell casing, mechanical
- Music Integration
Music State System
Game State → Music Response │ ├── Menu → Calm, loopable theme ├── Exploration → Ambient, atmospheric ├── Combat detected → Transition to tension ├── Combat engaged → Full battle music ├── Victory → Stinger + calm transition ├── Defeat → Somber stinger └── Boss → Unique, multi-phase track
Transition Techniques
Technique Use When Feel
Crossfade Smooth mood shift Gradual
Stinger Immediate event Dramatic
Stem mixing Dynamic intensity Seamless
Beat-synced Rhythmic gameplay Musical
Queue point Next natural break Clean
- Adaptive Audio Decisions
Intensity Parameters
Parameter Affects Example
Threat level Music intensity Enemy count
Health Filter, reverb Low health = muffled
Speed Tempo, energy Racing speed
Environment Reverb, EQ Cave vs outdoor
Time of day Mood, volume Night = quieter
Vertical vs Horizontal
System What Changes Best For
Vertical (layers) Add/remove instrument layers Intensity scaling
Horizontal (segments) Different music sections State changes
Combined Both AAA adaptive scores
- 3D Audio Decisions
Spatialization
Element 3D Positioned? Reason
Player footsteps No (or subtle) Always audible
Enemy footsteps Yes Directional awareness
Gunfire Yes Combat awareness
Music No Mood, non-diegetic
Ambient zone Yes (area) Environmental
UI sounds No Interface feedback
Distance Behavior
Distance Sound Behavior
Near Full volume, full frequency
Medium Volume falloff, high-freq rolloff
Far Low volume, low-pass filter
Max Silent or ambient hint
- Platform Considerations
Format Selection
Platform Recommended Format Reason
PC OGG Vorbis, WAV Quality, no licensing
Console Platform-specific Certification
Mobile MP3, AAC Size, compatibility
Web WebM/Opus, MP3 fallback Browser support
Memory Budget
Game Type Audio Budget Strategy
Mobile casual 10-50 MB Compressed, fewer variants
PC indie 100-500 MB Quality focus
AAA 1+ GB Full quality, many variants
- Mix Hierarchy
Volume Balance Reference
Category Relative Level Notes
Voice 0 dB (reference) Always clear
Player SFX -3 to -6 dB Prominent but not harsh
Music -6 to -12 dB Foundation, ducks for voice
Enemy SFX -6 to -9 dB Important but not dominant
Ambient -12 to -18 dB Subtle background
Ducking Rules
When Duck What Amount
Voice plays Music, Ambient -6 to -9 dB
Explosion All except explosion Brief duck
Menu open Gameplay audio -3 to -6 dB
- Anti-Patterns
Don't Do
Play same sound repeatedly Use variations (3-5 per sound)
Max volume everything Use proper mix hierarchy
Ignore silence Silence creates contrast
One music track loops forever Provide variety, transitions
Skip audio in prototype Placeholder audio matters
Remember: 50% of the game experience is audio. A muted game loses half its soul.