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evo-dubbing-audio-processing

Handles audio resampling, loudness normalization per ITU-R BS.1770-4, and LUFS measurement for TTS segments to ensure broadcast-quality output.

tasks-evolved/multilingual-video-dubbing/environment/skills/evo-dubbing-audio-processing/SKILL.md

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# evo-dubbing-audio-processing

Resamples audio from Kokoro's 24kHz to 48kHz and applies ITU-R BS.1770-4 loudness normalization.

## Key Functions

- `resample_audio(audio, orig_sr, target_sr)` - Resample numpy array
- `measure_lufs(audio_path)` - Measure LUFS using FFmpeg loudnorm filter (pass 1)
- `normalize_loudness(audio_path, output_path, target_lufs)` - Two-pass loudness normalization
- `process_segment_audio(input_path, output_path, target_sr, target_lufs)` - Full processing pipeline

## Usage

```python