There’s a couple of reasons I don’t use m4b files: - A lot of my audiobooks come as mp3, and converting to m4b (which is AAC based) would mean loosing quality.

There’s a couple of reasons I don’t use m4b files: - A lot of my audiobooks come as mp3, and converting to m4b (which is AAC based) would mean loosing quality. - Some MP3 players (even those that support AAC) don’t support M4B. - I want playback to stop automatically at the end of a chapter, unless I actively decide to start the next chapter. (Admittedly, some MP3 players don’t have an option for this anyway and will always start the next track. This annoys me.) - Even with chapter metadata, I find it difficult to seek through a 10+ hour m4b file. Seeking through a 10 – 60 minute chapter is more manageable. (Of course, this doesn’t always work out; A Memory of Light has a single chapter that’s more than ten hours long. Whatever, I want to split in a way that follows the author’s structure, and Sanderson purposefully chose to write one extremely long chapter.) I probably sound like I regularly switch between 20+ different models of MP3 player. In fact, I mostly use my computer or iPhone these days; however, I expect my audiobook collection to outlast any one piece of hardware.