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March 19, 2021 01:56
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Some PowerShell pranking fun. Combine with PSRemoting to confuse your co-workers. I've not used this since 2014, so I don't know if it still works.
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Add-Type -TypeDefinition @' | |
using System.Runtime.InteropServices; | |
[Guid("5CDF2C82-841E-4546-9722-0CF74078229A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] | |
interface IAudioEndpointVolume { | |
// f(), g(), ... are unused COM method slots. Define these if you care | |
int f(); int g(); int h(); int i(); | |
int SetMasterVolumeLevelScalar(float fLevel, System.Guid pguidEventContext); | |
int j(); | |
int GetMasterVolumeLevelScalar(out float pfLevel); | |
int k(); int l(); int m(); int n(); | |
int SetMute([MarshalAs(UnmanagedType.Bool)] bool bMute, System.Guid pguidEventContext); | |
int GetMute(out bool pbMute); | |
} | |
[Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] | |
interface IMMDevice { | |
int Activate(ref System.Guid id, int clsCtx, int activationParams, out IAudioEndpointVolume aev); | |
} | |
[Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] | |
interface IMMDeviceEnumerator { | |
int f(); // Unused | |
int GetDefaultAudioEndpoint(int dataFlow, int role, out IMMDevice endpoint); | |
} | |
[ComImport, Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")] class MMDeviceEnumeratorComObject { } | |
public class Audio { | |
static IAudioEndpointVolume Vol() { | |
var enumerator = new MMDeviceEnumeratorComObject() as IMMDeviceEnumerator; | |
IMMDevice dev = null; | |
Marshal.ThrowExceptionForHR(enumerator.GetDefaultAudioEndpoint(/*eRender*/ 0, /*eMultimedia*/ 1, out dev)); | |
IAudioEndpointVolume epv = null; | |
var epvid = typeof(IAudioEndpointVolume).GUID; | |
Marshal.ThrowExceptionForHR(dev.Activate(ref epvid, /*CLSCTX_ALL*/ 23, 0, out epv)); | |
return epv; | |
} | |
public static float Volume { | |
get {float v = -1; Marshal.ThrowExceptionForHR(Vol().GetMasterVolumeLevelScalar(out v)); return v;} | |
set {Marshal.ThrowExceptionForHR(Vol().SetMasterVolumeLevelScalar(value, System.Guid.Empty));} | |
} | |
public static bool Mute { | |
get { bool mute; Marshal.ThrowExceptionForHR(Vol().GetMute(out mute)); return mute; } | |
set { Marshal.ThrowExceptionForHR(Vol().SetMute(value, System.Guid.Empty)); } | |
} | |
} | |
'@ | |
# The above code is from here: https://stackoverflow.com/questions/255419/how-can-i-mute-unmute-my-sound-from-powershell | |
$existingMuteState = [Audio]::Mute | |
$existingVolume = [Audio]::Volume | |
# Un-mute | |
[Audio]::Mute = $false | |
# Set volume to something reasonable | |
[Audio]::Volume = 0.30 | |
Add-Type -AssemblyName System.Speech | |
$voice = New-Object System.Speech.Synthesis.SpeechSynthesizer | |
$voice.SelectVoice('Microsoft Zira Desktop') | |
# Say something | |
$voice.Speak("Error") | |
# Set volume back to what it was | |
[Audio]::Volume = $existingVolume | |
# Set mute state back to what it was | |
[Audio]::Mute = $existingMuteState |
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