I'm discarding most of the Dark Brotherhood armor, but I like the shoes, which have a "muffled" enchantment. I've got elven boots that have 30% sneaking buff – but it's worth sacrificing armor points if I can make no noise while sneaking… exactly what does the muffle enchantment do?
Extra question: Can I learn this enchantment? It doesn't seem to be possible…
Best Answer
Yes, it is possible to learn the muffle enchantment. Note that you can only put it on footwear though.
The reason why you can't get it off of the dark brotherhood armor is because you are not allowed to disenchant it. If you find a pair of random boots with the muffle enchantment on it, you can disenchant it to learn the effect.
Your enchantment has a hidden magnitude effect that lowers your armor weight penalty by a % (from 0-1). A magnitude of 1 will mean you suffer no noise penalty to armor at all.
Note, you can reproduce this effect with the muffle illusion spell and/or the silence perk.