I may have an answer to what this ringing/chain sound is during an
awake paralysis, or inbetween sleep and awake. Taken from a gnostic
audio where they are discussing this sound. It has to do with
a guru/master guy sitting in a temple in the astral. Focusing on the
sound and going to the location, the guy would help on further chakra
development.

They even described the location where it is and where he is located.
People having an oobe and hear this sound could just go to the location
and he would help out.

The answer was alittle surprising, besides other answers as; random
astral sound, brain created audio. Basicly nothing valid to it when
explained as random audio. But if there is some guy in the astral
creating it, it gives another meaning to the audio.

Just been thinking about this for a while until I heard the audio.
Some of these astral phenomenas drives me crazy, because the
answers may turn out to be not that complex afterall, but have
more suprising elements behind it.

Let me get back to it in more detail what they actually say. For those
interested in what this "chain/metal" sound might be, answer given
by the gnostics.