Piper S., Daniel Martinez, and the few others who find that the real music nature makes is better than any imitation, I knew there were a few hikers on these forums I'd actually like to meet on the trail, you guys sound like you'd be some of them.
Piper, if I can make a small suggestion, next time you hear the stream singing or talking, don't get creeped out, try joining the conversation/song. You might be very surprised by the outcome. The longer you stay at the spot the better the outcome, especially if the spot has been used for thousands of years by people.
I was stupid enough to bring my music player on my recent Big Sur trip, and I'm never doing that again, nothing on it was able to present even the palest imitation of the real music I got to hear. On the other hand, at Point Reyes, which is a very impacted, not very wild location, the music was nice at night now and then.
With that said, allow me a quick rant: I passed some clueless young guy hiking down a mountain in Big Sur, that is major rattle snake country. He was listening to an ipod or whatever. Ie, when the rattler politely alerts the approaching entity that it's time to stop, by rattling, this person would be unable to hear that warning in time, get bitten, then, were I to come along to him, I'd be put into the position of having to hike out to get him help, all because his addiction to auditory stimulation of an artificial type. This is a grotesquely irresponsible act, and totally selfish since it's putting others into the position of having to ruin their trip due to his idiotic decision to crank some tunes to help pass the time. Same goes for many other sounds the trail can give as warnings that might give you that second edge to react via hearing.
Ok, rant over, but please people, don't be foolish, if you are going through terrain where you need to hear sounds to protect yourself (in my opinion, that's all terrain, urban, rural, wilderness), do not wear headphones/ear buds, that's just not smart. And if you do, and you get a bite, or whatever, don't expect others to ruin their trips for your sake, and if you do, you'd better have the decency to offer major compensation to the person you force to help you because of your bad decision making, ie, pay for my next week trip etc..
Mark Primack , I missed your comments too, couldn't have put it better myself. I have only used these music players 2 times now in my life backpacking, and I don't plan in general on using them again, unless going to a place that just doesn't have 'the presence of the Lord' as you put it so nicely, ie, too human impacted. Don't miss the daily conversations going on around you, the birds, the animals, everything. I have a great music collection, at least in my opinion, and a great stereo, and I love music, but only because I need it because I live in an urban area, far away from real music.