Sounds like a cool midnight detour, dude. If you can capture that humming—just plug in a mic or use your phone’s recorder and timestamp each shift in the trail—then you’ve got the audio map. On top of that, jot down a few key turns, maybe a rough sketch of the ridge, and the time of day. That way the next night, you’ll know where the trail twists, and the hum will act like a soundtrack cue for the changes. Let me know if you need a rhythm to keep the logging steady.