Can someone explain what a semi-harmonic is, and how to play it? Thanks.

Well, you can play an ordinary note by picking it, and you can also play an artificial harmonic using that same note but picking so that the string hits your thumb. I will assume that we all know that much. A semi-harmonic is when you play with a bit less thumb, so that you can hear the original note and the harmonic at the same time. Just ease up a bit on the thumb. It's pretty easy to get with a bit of practice.

Thanks koglos!

The intro to 'Black Magic' by Slayer is semi harmonics apparently. I don't think they were ever particularly worried about hitting full harmonics live or anything though.

__________________