Disable Internal Speaker Dell Optiplex

1/6/2022by admin
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I'm having some issues trying to make the rear port (Blue/Pink) of the on-board Realtek HD Audio on a Dell Optiplex 7010 default to [MIC IN].
By default, when something is plugged to this port, a prompt appears asking whether it should be used as a [LINE IN] or a [MIC IN], but we have 3.5mm stereo leads permanently plugged in which allows headsets to be more accessible etc.
I resolved this same problem with previous models of Dell Optiplex (760,780 etc) that used Analog Devices and used GPP to change 5 registry settings; but the Realtek HD Audio is proving a bit more challenging!
After comparing before/after registry snapshots I have identified 4 registry keys that change when alternating between [LINE IN] and [MIC IN], as well as being able to disable the prompt screen too.
They are:
Disable JDPopup
HKEY_CURRENT_USERSoftwareRealtekRtDCpl64Genera lJDPopup 0x00000000
HKLMSOFTWAREMicrosoftWindowsCurrentVersionMMD evicesAudioCapture{37a7af77-2f9a-423c-94bb-9f2312376fcb}DeviceState: 0x00000001
HKLMSOFTWAREMicrosoftWindowsCurrentVersionMMD evicesAudioCapture{7dcd1141-9496-46dd-b91a-d5e5bb17c12d}DeviceState: 0x00000008
HKLMSYSTEMCurrentControlSetControlClass{4D36E 96C-E325-11CE-BFC1-08002BE10318}0000SettingsDrv5985_DevType_0269_S S10280577Pin19: 00 00 00 00
HKLMSOFTWAREMicrosoftWindowsCurrentVersionMMD evicesAudioCapture{37a7af77-2f9a-423c-94bb-9f2312376fcb}DeviceState: 0x00000008
HKLMSOFTWAREMicrosoftWindowsCurrentVersionMMD evicesAudioCapture{7dcd1141-9496-46dd-b91a-d5e5bb17c12d}DeviceState: 0x00000001
HKLMSYSTEMCurrentControlSetControlClass{4D36E 96C-E325-11CE-BFC1-08002BE10318}0000SettingsDrv5985_DevType_0269_S S10280577Pin19: 01 00 00 00
After adding these to a test GPP, on a test computer it works fine (albeit a reboot was required). The problem was when I went to test the solution on some production computers.
It was soon apparent that two of the registry entries had different key identifiers/field names for HKLMSOFTWAREMicrosoftWindowsCurrentVersionMMD evicesAudioCapture{THIS_VALUE_VARIES_FROM _PC_TO_PC}DeviceState:
It shouldn't be this difficult! I just want the Realtek HD Audio to permanently default to [MIC IN] (and disable the prompt <-- this bit I can do!) for all users.
Many Thanks,

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Any ideas how to disable the internal speaker of an optiplex computer but not the external audio output. Bit of a nighmare in a classroom if they are all making sound at the sametime!!!! 19th October 2016, 09:33 PM #2. We have a Dell Optiplex GX 280 on a test stand that beeps - the sound drivers don't work, so turning off the Windows sound has no effect. The internal speaker beeps annoyingly. Is there a way to fix this, short of taking the speaker itself out (not likely to happen)?

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DELL OptiPlex 760 Internal Speakers and Windows 10 (ADI 198x integrated audio drivers) is commonly caused by incorrectly configured system settings or irregular entries in the Windows registry. This error can be fixed with special software that repairs the registry and tunes up system settings to restore stability
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Note: This article was updated on 2020-12-05 and previously published under WIKI_Q210794

December 2020 Update:

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Disable Internal Speaker Dell Optiplex Desktop Computer

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More info on DELL OptiPlex 760 Internal Speakers and Windows 10 (ADI 198x integrated audio drivers)

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After some (unsuccessful) fiddling around, and searching, I found this post from 2009 (right around the release of Windows 7).

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(1) Download (DELL OptiPlex 760 Internal Speakers and Windows 10 (ADI 198x integrated audio drivers)) repair utility.

(2) DELL OptiPlex 760 Internal Speakers and Windows 10 (ADI 198x integrated audio drivers)

(3) Optiplex GX620 with Analog Devices ADI 198x Integrated Audio and Windows 7

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