Mute system from code

Question

I'm trying to mute the PC speaker from my C# console application. I've tried the code suggested on this site and it doesn't affect the volume on my machine. I need the code to work on Win7 and I assume that code only works on XP. I also tried this:

[DllImport("winmm.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)]
public static extern int waveOutSetVolume(IntPtr uDeviceID, int dwVolume);

waveOutSetVolume(IntPtr.Zero, 0);

But when the waveOutSetVolume method is called, the system is not muted and no error are thrown. Is there a way to mute the PC from C# in Win7?

do you want it for your application only or for the entire system to be muted? — John Riselvato, Mar 04 '12 at 04:07
Windows API calls don't throw exceptions. Try checking Marshal.GetLastWin32Error(); — luksan, Mar 04 '12 at 04:12

score 4 · Answer 1 · answered Jan 20 '18 at 14:12

You can use AudioSwitcher.AudioApi.CoreAudio extension for the AudioSwitcher library. Just install it as a Nuget package using Package Manager Console:

Install-Package AudioSwitcher.AudioApi.CoreAudio

It has a methods like Mute, ToggleMute and the Volume property, so you can set the value you want.

Here is an example:

using (var audio = new CoreAudioController())
{
    audio.DefaultPlaybackDevice.Volume = 50;
}

score 2 · Accepted Answer · edited May 23 '17 at 12:28

2

I believe this is what you are looking for. this has been test with windows 7 and also this question as been asked on SO before. Which probably will help you get what you are looking for.

edited May 23 '17 at 12:28

Community

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answered Mar 04 '12 at 04:12

John Riselvato

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Thanks. Unfortunately, the DLL is too bloated for my needs and the source is quite complicated so I'm going to try and pick it apart first as I just need the volume aspect. – XSL Mar 04 '12 at 13:33
I guess this is what you are going with? – John Riselvato Mar 05 '12 at 02:55
Yes, I couldn't condense it so I just used the library as-is. – XSL Mar 05 '12 at 22:09

score 0 · Answer 3 · answered Mar 04 '12 at 04:07

0

You cannot mute the PC speaker. It is a basic device, has no mixer, etc. What comes out of it is a constant volume.

What you show in your example is code to control your sound card's mixer, which is a completely different device.

answered Mar 04 '12 at 04:07

Brad

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The example John Reselvato posted works on my machine and I guess that it controls the sound card mixer. That's what I'd like to achieve (although the sample posted is very bloated and somewhat complicated to dissect just the volume part). – XSL Mar 04 '12 at 13:35
@SSL, Oh, I thought you wanted to control the PC Speaker. Yes, the winmm API has quite a bit to it. – Brad Mar 04 '12 at 16:39

Mute system from code

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