Re: Realtek Microphone Monitor - Here's how

K

Kp

Option 3 (SigmaTel on Vista Ultimate) worked perfectly on my Dell Inspiron
1420 laptop. Thanks, you saved a week of my life!

Neutrion said:
Dell ships its notebook computers with the ability to monitor the input
jack turned off. This means that you can't hear an audio signal routed
through the mic or line-in jack even though you can record the audio and
hear it when you play back the recording. An edit in the Windows
Registry will enable monitoring and let you hear the audio in real time.

There are 3 different sets of instructions below, sorted by operating
system and audio chip:

Models with Windows XP and a Sigmatel STAC 975x Audio Chip

Models with Windows XP and a Sigmatel STAC 92xxHD Audio Chip

Models with Windows Vista and Sigmatel STAC 92xxHD Audio Chip



=============================================================================================



Models with Windows XP and a Sigmatel STAC97 Audio Chip

This first set of instructions is only for these and similar models
with the Sigmatel STAC97xx audio chip running Windows XP :

Inspirons 1100, 1150, 1200, 2200, 2600, 2650, 5100, 5150, 5160, 6000,
8500, 8600, 9100, 9200, 9300, 300m, 500m, 510m, 600m, 700m, 710m,
XPS/XPS M170, XPS gen2 etc.

Latitudes D400, D410, D500, D505, D510, D600, D610, D800, D810 etc.

Precision Mobile Workstations M20, M60, M70 or any others with the
Sigmatel STAC97xx chip and Windows XP.

On these models running XP, monitoring can be restored by editing the
Registry subkey DisableMicFromPlayback.

[It is wise to create a System Restore point before editing the
Registry. To create a new Restore Point go to Start/Help &
Support/System Restore and tick 'Create a restore point'. Even better is
to save a backup copy of the Registry by using its 'Export' utility.]



1. Go to Start menu and click on Run. Type 'regedit' without quotes and
click OK to open the Registry.

2. At the top of the list, highlight My Computer.

3. Under the Edit menu, select Find.

4. Type in 'DisableMicFromPlayback' without quotes and click 'find
next'.

5. Highlight DisableMicFromPlayback. Right click on it and select
Modify.

6. Highlight 01 and change to 00. Click OK.

7. Optional (but 8600 users should do this) find "EnablePoPBypass" and
set the value to 00.

8. Optional (but 600 & 6000 should do this) find "DisableMicSelect" and
set the value to 00.

9. Exit the Registry and restart the computer.

Next, configure the system mixer:

1. Open Volume Control by right clicking on the speaker icon on the
taskbar, or go to Start/Control Panel/ Sound & Audio Devices
Properties/Advanced (button).

2. Under the Options menu, select Properties.

3. Under 'show the following volume controls' check the box next to
Microphone. Click OK.

4. A mic control appears in the Volume Control. Make sure the mute box
is unchecked.

5. If your external audio source (a stereo or tv tuner etc that you
have connected to the mic jack) has a way to control its volume level,
turn it down to control excessive input volume.



(Thanks to forum member dilleyo who figured this out, and to jk79 who
later clarified and explained it to me in terms I could understand. I
have put it into this step-by-step format for those of us who are not
familiar with editing the Registry.) This is the direct Registry path to
the key:

Computer\HKEY_LOCAL_MACHINE\System\ControlSet001\Control\Class\{4D36E96C-E325-11CE-BFC1-08002BE10318}\0005\Settings.



=================================================================================================



Models with Windows XP and a Sigmatel STAC 92xxHD Audio Chip



The following set of instructions is only for these and similar models
with the Sigmatel 92xxHD audio chip running Windows XP :

Inspirons B120, B130/1300, 6400/E1505, 9400/E1705, E1405/640m, XPS
M140/630m, 1420, 1520, 1720

Latitude D420, D520, D620, D820, etc. and any others with the Sigmatel
92xx HD chip and Windows XP.



On these models running XP, monitoring can be restored by editing the
Registry subkey EnableInputMonitor.

[It is wise to create a System Restore point before editing the
Registry! To create a new Restore Point go to Start/Help &
Support/System Restore and tick 'Create a restore point'. Even better is
to save a backup copy of the Registry by using its 'Export' utility.]



1. Go to the Start menu and click on Run. Type 'regedit' without quotes
and click OK to open the Registry.

2. At the top of the list, highlight My Computer.

3. Under the Edit menu, select Find.

4. Type in 'EnableInputMonitor' without quotes and click 'find next'.

5. Highlight EnableInputMonitor. Right click on it and select Modify.

6. Highlight 00 and change to 01. Click OK.

7. Repeat "find next" (F3) several more times and keep changing values
to 01 until the "EnableInputMonitor"'s coming up are of the proper
value.

8. Find a key named "EnableIntSpkrMute" and change its value from 01 to
00.

9. Exit the Registry and restart the computer.

Next, configure the system mixer:

1. Open Volume Control by right clicking on the speaker icon on the
taskbar, or go to Start/Control Panel/ Sound & Audio Devices
Properties/Advanced (button).

2. Under the Options menu, select Properties.

3.Under 'show the following volume controls' check the box next to
Input Monitor. Click OK.

4. Make sure the mute box is unchecked. Unfortunately the slider itself
will be frozen in place and won't control the outputted volume.



(Thanks to forum members emann15 and The Performing Flea for figuring
this out. I have put it into this step-by-step format for those of us
who are not familiar with editing the Registry). This is the direct
Registry path to the key:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E96C-E325-11CE-BFC1-08002BE10318}\0005\Settings\filter\Rear



=================================================================================================



Models with Windows Vista and a Sigmatel STAC 92xxHD Audio Chip



This set of instructions is only for models with the Sigmatel 92xxHD
audio chip running Vista (see the above section for the partial list of
models with 92xx chips). This Vista edit is known to work but might not
work for all of the models on the list .

On the models with a 92xxHD chip, monitoring can be restored by editing
the Registry subkey EnableInputMonitor; however this value is not
included in the Registry of Windows Vista operating system and so you
must type it in.

[It is just good common sense to create a System Restore point before
editing the Registry. To create a new Restore Point go to Start/Help &
Support/System Restore and tick 'Create a restore point'. Even better is
to save a backup copy of the Registry by using its 'Export' utility.]



1. Go to the Start menu and click on Run.

2. Type 'regedit' without quotes and click OK to open the Registry.

3. Using the + signs in the left pane, navigate through the registry to
get to this location:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E96C-E325-11CE-BFC1-08002BE10318}\0000\Settings\filter\SpeakerHp

4. Click on the key SpeakerHP to select it. (Some systems seem to lack
this key. In that case do this at 'Settings'.)

5. In the right pane, right click and select New > Binary Value.

6. Type 'EnableInputMonitor' without quotes and then press Enter.

7. Right click on the new name and select 'Modify'.

8. In the 'Value data' box, add 01 to the existing 0000 to make it 0000
01, then click OK.

9. Exit the Registry and restart the computer.

10. After restart, enable input monitor in Audio Properties.

(Right click your speaker in program tray. Click Playback devices.
Right click on Speakers/Headphones and click properties. Click on levels
tab. You will now see a box saying input monitor. Click the speaker
picture to unmute it.)

(Thanks to DellCommunity forum members ethan_hines, fuzzy34, and chef
moore for figuring this out.)


--
Neutrion
------------------------------------------------------------------------
Neutrion's Profile: http://forums.techarena.in/members/neutrion.htm
View this thread: http://forums.techarena.in/vista-hardware-devices/865259.htm

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absolutely brilliant!!! it was about a 3 hour search for the right answer to this one and finally came upon this. thanks pc review (whoever you are)!
 
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Thank you very much as well. This worked for me. However, I am usuing a pre-amp to connect an Xbox 360 to P.C. Speakers by this method and have come upon some static. More specifically, I have come upon lots of static and no control over the volume of my playback. Any ideas?

(I know this thread is probably somewhat dead, but I'll post anyway XD)
 

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