Sonic Gate

Stop paying humans to listen to corrupted audio files. Fix them automatically.

Sonic Gate is a CLI-first audio/video quality gate that uses deterministic audio analysis to catch corrupted, invalid, or low-quality audio files before they reach human reviewers or downstream pipelines.

Optional AI Probe: Includes an experimental Whisper-based speech quality probe (disabled by default) for users who want to detect language mismatches or speech quality issues.

Features

• Traditional Analysis (Fast & Deterministic):
  • LUFS loudness measurement (FFmpeg ebur128)
  • Silence detection (pydub)
  • Duration validation
  • Format/corruption checking
• Video Support: Auto-extract audio from MP4, MOV, AVI, MKV, WebM
• Fix Mode: Auto-trim silence, normalize LUFS, non-destructive repairs
• Multiple Formats: Table, JSON, CSV, Markdown output
• Optional AI Probe: Whisper-based speech detection (off by default)

Installation

# Install the deterministic core (fast, no AI dependencies)
pip install sonic-gate

# With optional AI probe (includes Whisper)
pip install "sonic-gate[ai]"

Or install from source:

git clone https://github.com/Codinglone/sonic-gate.git
cd sonic-gate
pip install -e .

Quick Start

# Analyze a single file (deterministic only, fast)
sonic-gate interview.wav

# Analyze a directory
sonic-gate ./recordings/

# With custom config
sonic-gate --config gate.yaml ./podcasts/

# Fix failed files automatically
sonic-gate --fix ./recordings/

# JSON output for CI
sonic-gate --format json ./files/ > report.json

# Demo mode
sonic-gate demo

Configuration

Default (Deterministic Only - Fast)

rules:
  traditional:
    max_silence_seconds: 3.0
    lufs_range: [-24, -16]
  
  ai_probe:
    enabled: false  # Whisper is OFF by default

output:
  format: table
  show_passed: false

With AI Probe Enabled (Experimental)

rules:
  traditional:
    max_silence_seconds: 3.0
    lufs_range: [-24, -16]
  
  ai_probe:
    enabled: true           # Enable Whisper
    whisper_model: base     # tiny/base/small/medium/large
    min_confidence: -1.0    # Logprob threshold (negative values)
    expected_language: en   # Optional language check
    speaking_rate_range: [100, 180]

fix:
  enabled: false
  output_dir: ./fixed
  normalize_lufs: -16.0

output:
  format: table
  show_passed: false

Note: The AI probe uses Whisper logprob-based confidence scores which are always negative. Typical values range from -0.5 (good) to -5.0 (poor). Adjust min_confidence based on your audio quality and language.

Performance

Analyzer	Speed	Notes
Traditional (LUFS, silence, format)	~4ms/file	Deterministic, always accurate
AI Probe (Whisper tiny)	~200ms/file	Optional, experimental
Video extraction	+100ms/file	One-time FFmpeg extract

Recommendation: Use traditional analysis for batch processing. Enable AI probe only when you need speech-specific checks.

Requirements

• Python 3.9+
• FFmpeg (for LUFS and video support)

License

MIT