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Windows 7: Mic inputs recognized but produce no sound

05 Feb 2017   #1
rocketman6

Windows 7 Pro 64
 
 
Mic inputs recognized but produce no sound

Native audio is Realtek HD.

My video card is an NVIDIA GeForce GTX 750 Ti.

Both are listed in Device Manager under Sound, vido and game controllers, along with my Logitech USB webcam and one other item:

- HD Pro Webcam C920
- Intel Display Uaido
- NVIDIA High Definition Audio
- Realtek High Definition Audio

For some reason, the webcam picks up audio just fine in all applications I've used it with (Logitech video recorder, Skype, Zoom, etc).

My Plantronics headset using their 2.5mm-to-USB adapter works okay as well. (When I plug that into the USB port, it adds "C-Media USB Audio Device" under Sound, video and game controllers in Device Manager.)

But if I try to use any other kind of mic input, it doesn't seem to work.

The Plantronics USB dongle for use with their Voyager Legend Bluetooth headsest won't work. It's listed but no sound input. Well, it shows sound registering in the monitor bar in Sound > Recording intermittently, briefly, on occasion, when first connect, but never holds. 99% of the time it's not registering any sound.

When I plug a 3.5mm mic into the front or rear mic input jacks, the same thing occurs.

In both of those cases, I've tried the USB and mic inputs on the front of the computer and the rear, with no change in the results.

I also tried a mic input with the webcam unplugged, and that didn't help either.

Maybe I need to get a 3.5mm-to-2.5mm adapter and plug my mic into the Plantronics USB adapter that works with their headset and shows up as C-Media USB Audio Device in Device Manager?

Any other suggestions would be greatly appreciated.

Thanks!


My System SpecsSystem Spec
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14 Feb 2017   #2
Schrade

Windows XP
 
 

A little hard to follow rocket, but is it possible that one sound device - either integrated (native to mobo), or dedicated, such as added-on peripheral, is disabling another sound device?

I have seen front panel and rear panel ports which are disabled when the other is used...
My System SpecsSystem Spec
14 Feb 2017   #3
rocketman6

Windows 7 Pro 64
 
 

Quote   Quote: Originally Posted by Schrade View Post
A little hard to follow rocket, but is it possible that one sound device - either integrated (native to mobo), or dedicated, such as added-on peripheral, is disabling another sound device?

I have seen front panel and rear panel ports which are disabled when the other is used...
Thanks.

I thought of that but the only peripheral I can think of that could be suspect was the Logitech USB webcam, which I unplugged to no avail. There's basic speakers plugged into the audio OUT port on the back, and that's about it. Printer. Scanner. Keyboard. Extra keyboard. Nothing that should be involved with audio input.

Unless it's the video card I put in???

The only other possibility I see is an item in Device Manager that says Other Devices > Unknown Device but since all else seems to be working fine I didn't know if it was advisable to delete that or not so I haven't. Maybe I should try that? (I assume if it's something that shouldn't be deleted it should reinstall itself fine?)

Other than that, it's a real mystery to me.
My System SpecsSystem Spec
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14 Feb 2017   #4
Schrade

Windows XP
 
 

I've ALSO seen where plugging in a sound device to NATIVE rear panel sound device port DISABLED the FRONT panel sound device port. Sounds like you've ruled that out tho'.

Worse than disabling, could be a driver conflict or a battle for hardware resources.

Disable (UNinstall) each sound device in Device Manager, and test for full function in each one individually. Then leave 2 installed, trying to see if any 2 or 3 don't work well together. Will be time-consuming, but I can think of no other way.

Resource Monitor might give a clue, but I wouldn't know what to look for; Task Manager / Performance tab / Resource Monitor / Overview tab.

And as I noted to another, some Graphics Cards with Surround capability will default the mic Port INput, to Center Channel OUTPUT, and I don't know if mic port can be set for INPUT with Surround mode enabled (or vice versa)...............
My System SpecsSystem Spec
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 Mic inputs recognized but produce no sound




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