Surprised nobody's discussing the critical impact of bitrate encoding on narrative clarity. Conducted A/B testing between Audible's compressed 32kbps files and library's 128kbps versions of the same title - difference isn't subtle. Low bitrate severely degrades frequency response in vocal range, particularly noticeable with British narrators where consonant distinction becomes muddy during emotional passages. Higher sampling rate preserves upper harmonics essential for speech intelligibility in transit environments. Device matters far less than the source material quality