I'm going to connect an electret mic (WM-61A) to my computer's "mic in", and am very confused on the reasoning behind a couple different diagrams/schematics that could possibly be used to do this with. The first one is from a thread on Head-Fi and seems to be the standard that everyone uses there: This is good to me, but then when I did a search for a couple different options, I found this: There's also another schematic using an AD654 op-amp specifically for phantom power. The one above claims to provide a "Phantom Ground"; what exactly is this compared to the first schematic and compared to a virtual ground? Could any of these be used for my purpose?
Please and thank you for any guidance given!