This question is an exact duplicate of:
Firstly my setup :
Microphone : Neewer NW-800
Phantom : Neewer NW-100 1-Channel 48V Phantom Power Supply
USB "interface" : One of those cheap USB soundcards
Software : Audacity, Adobe Audition CC
Hey everyone, so the brief explanation of my problem is that the mic works fine on its own when using only an XLR to 3.5mm cable, with only slight, natural background noise. But it records too quiet, so I need phantom.
Alas, as soon as the Phantom Power is turned on, a buzzing noise becomes a constant companion of mine. When using Audacity to toggle the settings a little bit I discovered when you lower the "Recording Volume" slider to 0,5 the hiss it almost gone, but then you can't hear my voice. The higher I slide, the louder the buzz is, all the way to 1,0. Problem is, I need to record on 1,0 to be heard.
Here is an audio example. I start at 0,5 and slowly slide to 1,0.
Setup goes like this :
Microphone--->XLR to XLR cable--->Phantom Power--->XLR to 3.5mm jack--->USB Soundcard--->PC
P.S: Discarding USB Soundcard does nothing, hiss stays.