Eliminating Frying Mosquitos - hardware suggestion

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bh2win
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Joined: Mon Aug 27, 2018 1:04 pm
Operating System: Windows 8 or 8.1

Eliminating Frying Mosquitos - hardware suggestion

Post by bh2win » Mon Aug 27, 2018 4:10 pm

Hi there,

I've googled a bunch and lurked on this forum's previous topics and run across this frying mosquitoes sound baked into my audio recordings.

I have an MXL 770 Condenser microphone that goes into an 'MXL-MICMATE PRO XLR To USB Preamp with gain' which is powered through USB to my computer.

I am thinking of eliminating my 'MXL preamp' altogether and recording into some other piece of hardware (mixer?) to just not have to deal with the frying mosquitoes and USB cable issues.

I've seen koz's previous posts where through use of 'Silence', 'Noise Reduction', 'Mosquito Killer' you can mask the frying mosquitoes but so many steps including the others to get the proper RMS Noise limit and Sound Floors just seems excessive.

Any ideas on how a piece of hardware that will help me eliminate this frying mosquitoes issue will be greatly appreciated. I'll look at low/high budget items so don't be afraid to suggest!

kozikowski
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by kozikowski » Mon Aug 27, 2018 7:36 pm

If you have "standard" frying mosquitoes we published a filter for it and you shouldn't need anything more.
multinotch.ny
(1.07 KiB) Downloaded 8 times
The whine sounds like this.

http://kozco.com/tech/audacity/clips/US ... neClip.mp3

What causes the problem is an interaction between a "home version" of a USB sound adapter and ratty USB in the computer. You're listening to computer data housekeeping which is supposed to be isolated from the USB power service...but isn't. You would normally be plugging a keyboard or mouse into this connector. Neither one cares.

A higher quality USB adapter would be filtering all that junk out of the USB service but that's the first thing they leave out in an "affordable" adapter.

We tried all kinds of patches and interference suppressors but the most reliable way to get rid of the whine is replace the computer.

Multinotch is not the best solution in the world. It's literally destroying certain pitch tones in the show. I think the default is 8. Most of the time you can't hear it working.

It's also possible that's not what you have. There are whines this filter won't touch.

Koz

bh2win
Posts: 52
Joined: Mon Aug 27, 2018 1:04 pm
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by bh2win » Mon Aug 27, 2018 7:54 pm

Koz, thank you for replying.

My whine sounds very similar and when I get home I'll upload a sampling though yours is a bit stronger than mine.

I mentioned before that this is my preamp https://www.amazon.com/gp/product/B001T ... UTF8&psc=1, the MXL MICMATE.

Would you recommend I try and find a higher quality USB Mini to USB cable to help with this issue?

kozikowski
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by kozikowski » Mon Aug 27, 2018 7:57 pm

MXL-MICMATE PRO
Most of the time, an interface with 48volt Phantom Power is immune to this problem. The maker goes through the trouble to create a clean, well-behaved 48 volts to run the microphone. You would have to be insane not to use that service to run the sensitive internal amplifiers.

So if the MultiNotch filter fails, then you don't have a classic Mosquito Whine.

You have something else broken.

And while we're here. Post a sample of the noise. Sometimes we can analyze or even just listen to tell you what's wrong.

http://www.kozco.com/tech/audacity/Test ... _Clip.html

Koz

bh2win
Posts: 52
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Operating System: Windows 8 or 8.1

Re: Eliminating Frying Mosquitos - hardware suggestion

Post by bh2win » Mon Aug 27, 2018 7:59 pm

Heading home in a minute from work.

Do you have a recommendation of an interface with 48-V PP (separate power) that connects through USB to a computer?

kozikowski
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by kozikowski » Mon Aug 27, 2018 8:13 pm

Dueling posts.

I doubt a new cable would help. It's usually a computer with ratty USB service.

The computer supplies 5 volts up the cable to run the keyboard, mouse or whatever you plugged in.

The problem comes when you plug in a microphone adapter. You try to run a super-sensitive microphone amplifier which is what's inside the MicMate and you don't bother to clean the 5 volts before you send it up the cable. Not a good combination.

The computer population splits cleanly between people who have this problem and people who don't. It's also somewhat non-gracefully called The Yeti Curse because lots of Blue Yeti microphone users have it.

We tried a physical plug-in adapter that's supposed to "clean" the USB service and that helped...a little. We know you can go through a good quality USB hub and get rid of the trash immediately. Also, immediately, users started buying crappy hubs that created more problems than they solved. So we stopped doing that.

Looking for that test clip.

Koz

bh2win
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Joined: Mon Aug 27, 2018 1:04 pm
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by bh2win » Mon Aug 27, 2018 8:44 pm

Here is the recording with AC off and no background noise.

Without MultiNotch
Without MultiNotch.wav
(676.29 KiB) Downloaded 11 times

With MultiNotch
With MultiNotch.wav
(612.54 KiB) Downloaded 11 times
Let me know what you think.

kozikowski
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by kozikowski » Mon Aug 27, 2018 8:54 pm

I doubt a new cable would help
We did notice other adjacent problems. Almost always, people would change the cable and the whine would change. Nobody ever had the whine go away.

I don't have any machines with the whine problem, so I can't give you part numbers for how to fix it, other than a Desperation Method we recommend for people in doo-doo (technical term) and have to get a show out the door.


OlympusWS823PaperTowel-500t.jpg
OlympusWS823PaperTowel-500t.jpg (86.83 KiB) Viewed 237 times


Stop using the computer.

Koz

bh2win
Posts: 52
Joined: Mon Aug 27, 2018 1:04 pm
Operating System: Windows 8 or 8.1

Re: Eliminating Frying Mosquitos - hardware suggestion

Post by bh2win » Mon Aug 27, 2018 8:55 pm

Now with voice.
Attachments
With_MultiNotch_Plus_Voice.wav
With Effect
(677.54 KiB) Downloaded 8 times
Without_MultiNotch_Plus_Voice.wav
Without Effect
(748.79 KiB) Downloaded 9 times

kozikowski
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Re: Eliminating Frying Mosquitos - hardware suggestion

Post by kozikowski » Mon Aug 27, 2018 8:58 pm

I think you have quite a number of problems, not just the audible one.

I need to drop for a while.

Koz

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