I am a newbie to this forum and also to recording. Just getting started with learning to record acoustic guitar with a microphone into a Focusrite Saffire PRO 14 with Garageband. SM57 sounded okay but I just received an SM81 yesterday. There are aspects I like of both, but neither one is wowing me. Of course I have more experimenting to do, but wanted to try recording through both at once to see how that sounded. The SM81 requires phantom power to be engaged on the Focusrite, but once I engage it the SM57 immediately gets quieter. Is this just a Garageband issue? Or is this a common thing to have phantom power make a mic that does not require it get quieter? The SM57 records just fine until I turn the phantom power on and boom it goes extremely quiet in Garageband. The signal to the Focusrite seems just fine based on the lights on the interface, as well as the lights in Saffire MixControl. Any advice is most appreciated!