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Microphone very loud and cannot change input level
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Question

When ever I plug in the microphone into the front or rear mic inputs, I can hear the mic very loudly through the PC speakers, and changing the input level in System Preferences don't change a thing, the sound level bar is still the same, and it is like the monitor microphone setting is on. The only time I cannot hear it is when I turn the mac volume level all the way down, if it is at level one, the mic is as loud as it is when the volume is at max. In Garageband, the sound level is really low, and it is hard to record anything, help?

 

CPU - i5 3570k

GPU - MSI  GTX 760 TF

Mobo Chipset - b75

Network Chipset - Atheros AR9285

Audio Card - Realtek alc982

 

Note the positions of the volume slider, the mic input slider, and two input levels on system preferences and Garageband

 ScreenShot2014-07-31at71910AM.png

 

ScreenShot2014-07-31at72021AM.png

 

ScreenShot2014-07-31at71940AM.png

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5 answers to this question

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Also too.

 

try: in terminal

#1

sudo nvram SystemAudioVolume="%80"

reboot

 

OR

#2

sudo nvram SystemAudioVolume="%00"

reboot
 

 

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Also too.

 

try: in terminal

#1

sudo nvram SystemAudioVolume="%80"

reboot

 

OR

#2

sudo nvram SystemAudioVolume="%00"

reboot

 

When you wrote "reboot" beneath the line of commands, does that mean to reboot the computer?

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Also too.

 

try: in terminal

#1

sudo nvram SystemAudioVolume="%80"

reboot

 

OR

#2

sudo nvram SystemAudioVolume="%00"

reboot

 

 

Thanks for the reply, but typing these commands in did not have any effect, even after rebooting

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I found a solution.

 

1.remove the voodoo hda driver (ktext) in installation OR /S*/E*/

2. update the voodoo hda driver (directly from official site)

 

 

in my case, the 'internal mic' don't turn off.

 

good lucky.

 

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REAL

 

i found a solution!

 

if you mic don't have 'noise cancelation', you need edit you info.plist

in the file /system/library/extensions/voodoohda.kext directory

 

p. ex., you can change initial parameters, after reboot, fix it!

 

good lucky

 

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