6
votes
Why do some audio amps use AC while others use DC
Is AC current fundamentally better as a working current when it comes to amplifying audio signal?
No. If anything, using an AC power supply makes it more difficult to have low noise.
The circuits ...
- 1,738
5
votes
How can I make a voice in the background come to the foreground and remove foreground noise?
Short, honest answer: nope, forget it.
In principle it's possible nowadays to separate any part of a signal, using software like iZotope RX or the (rather dated, by now) Algorithmix Renovator. These ...
- 6,116
5
votes
Accepted
Why do some audio amps use AC while others use DC
The type of current is actually completely irrelevant as all transmitted power is AC. Unless you are driving your amplifier from batteries, everything has to be converted at some point to DC.
The end ...
- 8,900
4
votes
Accepted
Faking depth and stereo separation?
It depends on what you mean by “cleaner” really. Is this a professional or amateur recording? If you just want to improve the recording, then there are many things you can try. EQing to get a better ...
- 2,670
4
votes
Isolate a subwoofer from the floor below
How much money have you got to spend & would you consider replacing the floor entirely with a new one made of solid concrete, not connected to the current walls or floor?
That is not as frivolous ...
- 8,740
4
votes
Is it possible to remove a whistle-like noise from audio?
A very High-Q notch EQ filter can do the trick, although I would probably recommend spectral cleaning to nail this. Izotope RX Advanced Spectral Cleaner is the way to go.
- 8,900
3
votes
Why is there noise in my spectrum analyser despite having no external devices plugged in?
All audio electronics create noise, including your interface itself. It's actually pretty good that the self noise of the interface is at around -100 dB.
Even when all other sources of noise are ...
- 2,291
3
votes
Noise in usb audio interface?
This could be a variety of things but there are a few things you can do to trouble shoot.
Ensure that everything is plugged into the same outlet. In some cases crossed grounding can cause buzzing if ...
- 1,010
3
votes
Why am I hearing weird static nosie on my speakers
I have figured out the problem. We had a netgear wifi router connected to the mixer. It is supposed to enable wireless connectivity to our mixer. If I turned that off, the mic signal doesnt drop and ...
- 151
3
votes
What is the best way to reduce background noise on a video recorded with a camcorder (background chatter)?
There are automated algorithms like those you tried in iMovie, the ones in Audacity might be worth a try but if you want better results you should individually edit phrases.
Software like izotope RX ...
- 852
3
votes
Accepted
Denoising studio induced noise and noise due to poor recording
Firstly, do any and all processing in WAV files. If your source material is on CD, then rip to 44.1kHz/16bit WAV and process at 24-bit in your software. Do not transcode via mp3.
Tracks like 104b ...
- 8,900
3
votes
Accepted
Does DC translate to sound?
Sound is derived from vibrations which in turn are generated or represented by changing current levels. Sound can never be derived from a static voltage or current. Your statement that "DC should ...
- 8,900
3
votes
Accepted
What is causing the 5.5 kHz noise in my recording setup
This is a broad sweep at the issue, some guesswork & experimentation required.
First of all, if you have an alternative DAC try it, no matter how basic, just to eliminate the simplest explanation....
- 8,740
3
votes
Background Noise Removal in Audacity 3.0.2
As you've not uploaded a sample, I can't say for sure, but the first step should be trying to understand where exactly the noise is. To do this, you can use spectrogram view that shows your audio file ...
- 33
3
votes
Background Noise Removal in Audacity 3.0.2
If you have a podcast file consisting only of human voices, you owe it to your future self to check out some AI-powered audio tools for cleanup. I've done the “conventional” ways, including the ...
- 489
3
votes
Accepted
Is this a good way to eliminate nose whistle from a recording?
Based on a comment I got that said "if all you have is EQ, then it's the best you can do. Modern "AI"-based noise reduction can probably do a far better job in one click", I found ...
- 141
3
votes
Scratchy noise with studio monitors
Trying with your laptop was a great idea and tells us what the problem likely is. There’s probably some kind of grounding issue with your desktop computer and that’s causing noise in the ground ...
- 2,291
3
votes
Accepted
my USB mic is on an arm and connected through a shock absorber, still picks up noise from my mouse
You're going to need to fasten the arm to something else, not connected physically to the desk.
I have a mic very similar to that [I bought it just to answer questions like this] & the 'shock ...
- 8,740
3
votes
Electrical hum?
There are two ways to tackle this - the proper way & the easy way.
The proper way is to identify & isolate your source of interference. 'Hum' is going to be something at mains frequency. You'...
- 8,740
2
votes
USB input high-pitched whine
I have the exact same interface and was hearing the exact same noise, except it was not there when I bought the interface.
It does seem to be a power-supply-related problem, turns out the noise only ...
- 121
2
votes
USB microphone introduces buzzing after a few minutes of listening
Had the same problem for years, until I read this thread and decided to try some diagnostics testing before buying a new mic. Whaddya know? Problem basically solved.
Mic AT2020 USB
DAW: Reaper
Same ...
- 21
2
votes
Recording quality has significant noise
There are a dozen different things that could be called "noise". Unless we can identify exactly what kind of "noise" you are talking about, we probably can't help you much. Take 30 seconds of ...
- 1,869
2
votes
Accepted
Recording: Sporadic ground noise with DI acoustic guitar
If it looks like a duck, walks like a duck & quacks like a duck, then it's fairly safe to assume it's a duck.
If it stops when you ground yourself to the cable shield, then why not just tie a ...
- 8,740
2
votes
Accepted
Mixing by aux out to aux in
1.This method will work with some sound deterioration.
There will be significant latency if you're using default drivers (non-asio)
2.Sound source coming from master won't deteriorate.
Neighter ...
- 852
2
votes
Who makes the quietest microphone?!
https://www.lewitt-audio.com/microphones/lct-recording/lct-540-subzero
The Lewitt LCT540 has the quietest specs I've seen available in a commercial mic.
2
votes
Accepted
How can I fix robotic distortion from an audio track?
Buffer underrun might have caused that distortion to the audio.
Buffer values can be increased in the audio driver section of the software or DAW you're using so that the issue disappears when ...
- 852
2
votes
Accepted
Idle noise on audio-interface when listening trough headphones
Turning the monitor control all the way should give you only the playback source in the output.
The monitor control is there to set the amount of direct input to playback when you're tracking live ...
- 768
2
votes
Equalizer: what dose each sound bar numbered 60, 230, 910, 3.6k, and 14k. And how do I set to get rid of all background sounds
Each of those numbers is the main frequency that you can change the volume of. You need practice (with your ear) to figure out what freq does what in your case, you just need to know that you only ...
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