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Windows 7: Why is Windows showing less volume for an external monitor's speakers?

10 Jan 2017   #1
SevenOfNine

Windows 7 64-bit
 
 
Why is Windows showing less volume for an external monitor's speakers?

When a friend's laptop was connected to an external HDMI monitor with integrated speakers, the volume attainable through the laptop speakers was louder than that attainable through the external monitor.
Hardware differences could easily account for the volume differences.

But what was odd was the Windows 7 sound control panel. The image below is an example of that control panel (but on their system, Headphones would be replaced by the external monitor's speakers).



Even though all volumes were turned up to 100%, when the laptop's speakers were set as the default, the green level indicators would fill all the bars (during loud sounds), but when the external monitor's speakers were set as the default, the green level indicators would never fill more than half the bars.

Why is this, and can anything be done to improve the volume on the external monitor?


My System SpecsSystem Spec
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10 Jan 2017   #2
fireberd

Windows 10 64 bit
 
 

When HDMI connection is used, the HDMI sound is generated separately from the regular PC audio. The HDMI audio, in almost all cases, is either generated internally in the video card or generated from an S/PDIF (digital) connection. Then you have the difference in the audio system in the external monitor. Thus comparing the regular PC audio to HDMI isn't a good comparison.
My System SpecsSystem Spec
10 Jan 2017   #3
SevenOfNine

Windows 7 64-bit
 
 

Quote   Quote: Originally Posted by fireberd View Post
When HDMI connection is used, the HDMI sound is generated separately from the regular PC audio. The HDMI audio, in almost all cases, is either generated internally in the video card or generated from an S/PDIF (digital) connection. Then you have the difference in the audio system in the external monitor. Thus comparing the regular PC audio to HDMI isn't a good comparison.
Thanks for your reply.

So sound being output over HDMI isn't generated by the sound chip on the motherboard? If so, I didn't know that. I thought the HDMI was just a cable that carried the video and sound signals similar to how a VGA cable carries a video signal and an audio cable (or headphone cable) carries a sound signals.

If the sound is being generated by a completely different system, then it does make sense that the audio levels would be totally different for laptop speakers vs. HDMI monitor speakers. But are you sure it's generated by a totally different audio source?
My System SpecsSystem Spec
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11 Jan 2017   #4
fireberd

Windows 10 64 bit
 
 

That is the way most (all I've seen) works. If you look at the Device Manager, Sound section you will see two sound devices listed, HDMI Audio and regular PC Audio.

Here is an example from my PC. Disregard the "Tranzport" entries as that is a controller for my recording studio system.


Attached Thumbnails
Why is Windows showing less volume for an external monitor's speakers?-device-manager-capture.jpg  
My System SpecsSystem Spec
14 Jan 2017   #5
SevenOfNine

Windows 7 64-bit
 
 

Quote   Quote: Originally Posted by fireberd View Post
That is the way most (all I've seen) works. If you look at the Device Manager, Sound section you will see two sound devices listed, HDMI Audio and regular PC Audio.

Here is an example from my PC. Disregard the "Tranzport" entries as that is a controller for my recording studio system.
Thanks. In your example, which is the HDMI Audio and which is the regular PC Audio?
My System SpecsSystem Spec
25 Jan 2017   #6
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

If I'm not mistaken, and the entries are the same as my system, so I should be correct...

The AMD entry is the HDMI, and the Realtek entry is the standard PC audio.
My System SpecsSystem Spec
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 Why is Windows showing less volume for an external monitor's speakers?




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