Fighting Game · Guides & deep dives

V2 Audio Cooking

A guides & deep dives document in the Fighting Game library.

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V2/ue/Tools/plan-v2-audio-cooking.py expands V2/ue/Build/Cooking/v2-audio-cooking.json into deterministic Unreal commandlet commands for every audio set and platform profile.

Source coverage is WAV and FLAC. Every profile uses Opus for .opuspak streaming chunks, with seek tables and sample-accurate chunk alignment. PC, Switch2, and Mobile package as Opus, while PS5 uses ATRAC9 and Xbox profiles use XMA2 for platform package codec selection.

The plan covers streamed music, streamed dialogue, resident combat SFX, and streamed ambience. Every command records bitrate, sample rate, channel layout, loudness target, streaming chunk duration, output package, deterministic cache key, and a dependency sidecar ending in *.v2deps.json.

Required gates:

  • audio-cooking-plan-generated
  • audio-cooking-opus-streaming-profiles
  • audio-cooking-platform-codec-profiles
  • audio-cooking-streaming-chunks
  • audio-cooking-dependency-sidecars

The primary metrics are cook.audio.opus_streaming_profile_count, cook.audio.platform_codec_profile_count, cook.audio.streaming_chunk_count, and cook.audio.dependency_sidecar_count. The CI validator is:

bash
python3 V2/ue/Tools/check-v2-audio-cooking.py