It’s an ST55 FET Condenser microphone and I have it going through an A R T professional Mic preamp. See attached Pic (I hope). I don’t know what buttons to push on it. I’m guessing that it’s the problem though. ‘Normal’ ???
You’re working today I see. Good for me, maybe not so good for you.
Okay, I see what you mean. I have a power strip and everything is pretty bunched in together. I’m also using a laptop. Does that matter? The problem doesn’t occur with the other mic, right? So must be the connections on this mic and preamp - or the plug? Thanks SO much for your help. ACX told me there was an electronic hum but I had no idea where to even start.
Amazing that you can here if the hum is U.S. or U.K.
Not that amazing. US power reverses direction 60 times a second and the UK does it 50. Interference tends to follow multiples, so hum and buzz in the US tends to 120-240-360, etc. Analyze > Plot Spectrum will draw me a tone pitch map.
Three prong on the ART and USB to the computer…
That’s dangerous. The only interface I know configured that way wouldn’t do this job right. Model numbers? Any other information? Getting your voice into the computer seems like it should be a snap … and it’s not.
I switched out the cable to the mic - had another one handy. No change. I’m thinking about taking the preamp to guitar center, maybe get a different power supply to the mic? I don’t even know where this one came from. I’ll look at it again one more time after I get back from the gym.
You should have your Microphone plugged in with one single 3-pin XLR cable directly to the back of the ART. The Middle button on the Art, P-Power+48v should be pressed. No other adapters or odd cables. No other buttons.
As near as I can tell from the instructions, the microphone has no lights to tell you what’s going on, so that’s as far as that goes.
Also as far as I can tell, the ART has no place to put headphones, so wer’e flying a little blind.
Then it goes through the Mystery Adapter into the USB socket on the laptop.
That should work right now. Does it? Do you still have the hum?
If you do, unplug the computer from the wall power and try it again. Run on battery. Even if the hum doesn’t go away, did it change?
I reeelly want to know more about the thing between the ART and the computer. Does it plug into the wall?
I misspoke about the power supply. Sorry. The ART connects directly to the computer. I was interchanging the name (ART/Power supply). The ART has three connectors in the back. One to the electrical outlet (a power strip), one to the microphone 3-pin XLR cable, and one with a USB connector on one end with a 3-pin connector plugging into the ART. I pulled out the plug and it was much worse. I can only gauge the noise by the green lights that flash in Audacity. It seems better now. Here’s another sample. Did switching out the cable work? I don’t get much volume though.