Spec References
Audio Delivery Spec References
The technical requirements of the major delivery platforms, verified against the official sources and kept current. Every page carries a last-verified date.
ACX / Audible
ACX Audio Submission Requirements
RMS level, peak, noise floor, MP3 format, room tone and per-file consistency for audiobook delivery.
EBU R128
EBU R128 Loudness Requirements
-23 LUFS in EBU Mode, -1 dBTP true peak, LRA descriptor and the shortform variant for European broadcast.
Netflix
Netflix Audio Delivery Requirements
Dialogue-gated -27 LKFS, the 15% low-dialogue fallback, -2 dBTP true peak and format requirements for near-field mixes.