Auditory hallucinations can be extremely entertaining.
I ate a few magic mushrooms I found while walking in the UK. On returning home I went to bed to relax. Someone was playing some music downstairs, I could only faintly hear it, the general ambient sound was louder. My brain elaborated the faint auditory signal to create the most fantastic music I had ever heard, and it filled my head like it was super hi fi. Curiously I was able control the sound effects and elaborate instrumentation at will in real time, like I was some omnipotent engineer/DJ/composer.
You can learn to do this when not tripping, but it's much easier to pick up when on drugs. I often hear instrumental music that's entirely a hallucination when drifting off the sleep—rock, jazz, pop, I'm not sure how my brain decides. As best I can tell most of it is synthesized in my brain—it's quite different from "playing a track in your brain" from memory.
When I was a kid I had that same exact feeling every time before I went to sleep - I could hear music in my head and as I fell asleep it became more live and hifi, I could almost see the band playing.
I ate a few magic mushrooms I found while walking in the UK. On returning home I went to bed to relax. Someone was playing some music downstairs, I could only faintly hear it, the general ambient sound was louder. My brain elaborated the faint auditory signal to create the most fantastic music I had ever heard, and it filled my head like it was super hi fi. Curiously I was able control the sound effects and elaborate instrumentation at will in real time, like I was some omnipotent engineer/DJ/composer.