Hey guys, sorry for such a noob question, but I was wondering how do you increase the duration for soul trap? Currently I found a weapon that will trap soul if enemies die in 4 seconds so I disenchanted that. But for me right now, 4 secs is not really enough. I tried increase duration by using grand soul gem and such, but it won't go up any further than 4 seconds. And I can't disenchant other weapons with longer duration for soul trap either (since I've already "learned" it).

Any ideas? Thanks in advance!

The duration depends on your Enchanting level + the size of soul gem you use when you enchant the weapon.

Edit: I don't mean they're added together, I meant "and". Basically, use a Grand Soul Gem and you'll get the longest duration your current Enchanting level will allow.

Ooh, now that makes sense, thanks a lot!