I enjoyed listening to some of "Out of Your Mind" By Alan Watts while on a medium dose of Ketamine. That was my only experience with listening to speeches/audiobooks on dissociatives, though.
Audiobooks on MXE are actually my favourite use of the substance. You have to practice it a little bit so that you focus on what's being said and you can't do it on hole level doses.
First audiobook I listened to Dark Matter (ghost horror story) and it was a great experience. Pretty terrifying as well.
I also listened to the entire Hyperion series on MXE; an experience I also recommend
The duration of MXE is perfect for audiobooks and even at higher doses approaching a hole you can still follow everything that is being said (start off lower though).
I would feel like I was inside the book experiencing what was happening. It wasn't like actually seeing it as visually real. It can be visual to some degree but it's just an enhanced kind of imagination. In other respects it feels like actually being there (emotional reaction, bodily reactions etc..).
Anyone who likes MXE and reading; give it a go! Get something with a voice actor you like. You can get free books off audible and then cancel the subscription before you get charged.