Audio Quality Standards for Streaming
Master loudness levels, file formats, and delivery specifications required by major streaming platforms.
Streaming platforms enforce strict audio quality standards to ensure consistent listener experience and fair artist compensation. Understanding loudness targets, file formats, and technical specifications prevents rejection and maximizes perceived quality.
Loudness Standards
The most critical specification is loudness, measured in LUFS (Loudness Units relative to Full Scale). Streaming platforms normalize audio to prevent jarring volume jumps between songs.
Platform-specific targets:
- Spotify: -14 LUFS
- Apple Music: -16 LUFS
- YouTube Music: -13 LUFS
- Tidal: -14 LUFS
Your mastering engineer should target -14 LUFS for universal compatibility. This represents a shift from the "loudness war" era where mastering meant maximum compression and limited dynamic range. Modern streaming rewards dynamic, well-mastered audio.
File Format Requirements
Streaming platforms accept various formats, but specifications matter:
Preferred formats:
- WAV: Uncompressed, 16-bit/44.1 kHz minimum (24-bit/48 kHz ideal)
- FLAC: Lossless compression, same bit depth options
- MP3: 320 kbps minimum (older standard, still accepted)
Format best practices:
- Avoid MP3 below 256 kbps; quality degrades noticeably
- Use 24-bit mastering files for maximum headroom, even if delivered at 16-bit
- Include proper metadata tags (ID3 for MP3, Vorbis for FLAC)
- Ensure stereo files don't exceed -3dB on any channel to prevent clipping
Technical Delivery Specifications
Beyond audio, distributors require specific technical metadata:
File naming: Use clear conventions like \