| Attribute | Specification | |-----------|----------------| | | AAC LC (Low Complexity) or HE-AAC v1/v2 | | Sample Rate | 44.1 kHz or 48 kHz (commonly 44.1 kHz) | | Bitrate | Variable: 64–128 kbps (common for M4B; 64 kbps HE-AAC v2 can sound equivalent to 128 kbps MP3) | | Channels | Stereo (joint stereo) or mono (less common) | | File Extension | .m4b (identical structure to .m4a but flagged as ‘bookmarkable’) | | Metadata | Embedded: title, artist (narrator? here: actors), album (Outlander S01E13), cover art, chapter markers, iTunes audiobook flag | | DRM | Typically none if sourced from CD rips or non-store purchases; commercial versions (Audible, Apple Books) may have DRM |
For a deeper dive into the production and fan reactions, you can check out reviews from or detailed recaps on Entertainment Weekly . outlander s01e13 m4b