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ZED10FX Hiss/Noise with USB

I have a ZED10FX mixer that I use for Zoom calls with a guitar, a mic and a backing track. I use the USB out from the ZED to the computer, and choose that USB input as the "microphone" in Zoom. The problem I've been having is that (only) when the ZED gets connected from the USB to a computer, there's a high pitch noise or hiss that comes out through the mains, the aux and the headphone out of the mixer.

MXL 770 quiet and loud hissing

My MXL 770 is very low volume and there is a noticeable hiss.
I haven't used it in a while and the last time it was on a different computer and it worked fine.
I use a Neewer 48V 1-channel phantom power supply.
I am not very experienced in troubleshooting this kinda stuff so if anyone could help me thatd be great!
I put an audio clip so you can see what I mean.(gotta crank the volume)

MXL 770 picking up weird hissing noises?

For some reason when I'm in fruity loops my microphone picks up buzzing sound and hissing noises.

mxl 770 cardioid condenser microphone paired with a Neewer 1-Channel 48V Phantom Power Supply with Adapter, BONUS+XLR 3 Pin Microphone Cable for Any Condenser and

SiYear 3.5mm Mini Jack Stereo to XLR Female Microphone Cable, Unbalanced 1/8 inch to XLR 3 Pin Interconnect Cable Cord Adapter (1.5Feet) to connect to my pc

this is what i have going on

Help with vintage mic,Telefunken - SABA - AKG D77 gain and hiss

Hello from Spain. I'm new in this forum and a newbie into recording,

I'm starting to record using my Mac, Logic and Roland Quad Capture. Mainly I record electric guitars signal and midi stream. I have not used microphones before but USB mics.

Now I'm trying to use a vintage stereo microphone (Telefunken - SABA - AKG D77) from a tube reel-to-reel recorder from the 60's. It has a 5pin DIN connector that I have split into two TSR mono connectors (not balanced). (The mic is identical to this one

hiss when mic is off.

Hi. Okay, I have a Shure BG 4.1 mic and a Tascam US-122L interface. My problem is hiss. Sibilance. Snake impressions. :) I hear it when record monitoring is on, and it's still there when I turn the mic off. And when the mic is off, the hissing gets louder and quieter as I adjust the gain, which my ignorance and I agreed is pretty interesting. When I yank the mic out of the interface, the hissing stops, then it slowly returns when the mic goes back in. Can anyone give me a better idea of what I'm dealing with here? Perhaps a way that I can defeat it?

Mic - Preamp - Compressor - Audio Interface (Low Input Signal vs High Hiss Noise)

All the while, I recorded my vocal & instruments like guitar directly from the Mics (condenser & dynamic) to the Audio Interface.
And, recently, grabbed a preamp + compressor for recording. Sound is good! In fact, facing an issue ~ Low Input Signal BUT High Hiss Noise Level! This makes me spent a big times to tweak the Denoiser + Expander + Noise Gate to reduced the Hiss Noise. Indeed, quality/colour of the recorded audio like guitar, cello... not as sweet & pretty like the source anymore after the tweaked!

My setting was :

Deciding what way to troubleshoot background hiss or grounding problem...

So, I have been working over the past couple of years intermittently trying to record both my guitar, and lately my voice, using my laptop and audio interfaces. I have always run into the same problem: background hiss and white noise. I have done this using Windows (XP, Vista, and now Windows 7 64-bit), as well as Cakewalk Music Creator and Reaper.

Annoying hiss in recordings.

Hi, first post here... Hoping someone can help!
I've been recording my modular synths through my MOTU Ultralite Mk3 Hybrid (using usb) Soundcard into a PC using FL Studio's Edison Recorder and I keep getting this annoying hiss sound on my recordings... Same thing if I record my mixer's (Soundcraft EPM8) monitor outs into the soundcard. It's getting very annoying as I don't have cash for more gear and I'm pretty sure the equipment isn't malfunctioning. All I want is a clean sound. Any advice as to how I can go about fixing this issue?