How to change default audio input device programatically

Question

I am looking for a way to set/change default input device inside my application. I have several different recording devices and it is very anoying to go into the control panel and change default recording device. I was looking around and I did not find anything that could help me with the problem. Application is written in c# and it is targeted for Windows Vista / Windows 7.

kwyntes · Accepted Answer · 2022-10-03 22:15:07Z

4

This can now (actually for quite some time already) be done very easily using the AudioSwitcher.AudioApi.CoreAudio NuGet package.

Simply create a new CoreAudioController:

var controller = new AudioSwitcher.AudioApi.CoreAudio.CoreAudioController();

Get hold of the desired device using its GUID:

var device = controller.GetDevice(Guid.Parse(...));

And lastly set it as the default playback device:

controller.DefaultPlaybackDevice = device;

Note: this answer was also posted under this question.

answered Oct 3, 2022 at 22:15

kwyntes

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2 Comments

F34R Over a year ago

I don't really need this anymore but since you provided an answer after 13 years you do need a thumbs up. I also tried the package and it works as expected.

Leon Over a year ago

I tried that in my app. The very first line var controller = new AudioSwitcher.AudioApi.CoreAudio.CoreAudioController(); goes in and start throwing exceptions inside of it and ruturns a minute later but exceptions keep displaying: Exception thrown: 'System.NullReferenceException' in AudioSwitcher.AudioApi.CoreAudio.dll

Anders · Accepted Answer · 2009-08-31 16:16:27Z

1

There is no public API to do this in Vista/7 AFAIK.

For a media center launch thing I created, I had to open the control panel and send keys to the dialog, a big ugly hack, but it's the best you can do. (Or run .net reflector on media center (It is able to change it, using undocumented calls))

answered Aug 31, 2009 at 16:16

Anders

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4 Comments

F34R Over a year ago

Opening control panel is not an option and I dont need it for media center, but tnx for suggestion.

Anders Over a year ago

Opening the control panel and automating the dialog is your only legal option

Anders Over a year ago

@Matthias Vance blogs.msdn.com/larryosterman/archive/2008/07/11/… see the last comment by Larry

user215361 Over a year ago

You are right, I was confused by the answer giving in the other SO thread (user replying that it would work on Windows 7).

svick · Accepted Answer · 2011-07-21 16:37:35Z

0

If you had Windows XP, apparently, you can do this by editing the registry. The key HKEY_CURRENT_USER\Software\Microsoft\Multimedia\Sound Mapper\Playback contains the name of the current default playback device.

answered Jul 21, 2011 at 16:37

svick

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Saber · Accepted Answer · 2024-05-09 07:21:23Z

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Today, on. net 8's WPF, AudioSwitch AudioApi CoreAudio can no longer work, and I have found another answer. The author's method can be easily solved Use "CoreAudio" Modifying audio playback devices

edited May 9, 2024 at 7:21

answered May 9, 2024 at 6:17

Saber

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1 Comment

Community Over a year ago

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