Speaker

@echo off

title Activate Speakers (Unmute + 80% Volume)

:: Uses built-in PowerShell + CoreAudio COM to unmute and set master volume

powershell -NoProfile -NonInteractive -Command ^

  "$sig = @'

  using System;

  using System.Runtime.InteropServices;

  [Guid(\"5CDF2C82-841E-4546-9722-0CF74078229A\")]

  interface IAudioEndpointVolume {

    int RegisterControlChangeNotify(IntPtr pNotify);

    int UnregisterControlChangeNotify(IntPtr pNotify);

    int GetChannelCount(out uint pnChannelCount);

    int SetMasterVolumeLevel(float fLevelDB, Guid pguidEventContext);

    int SetMasterVolumeLevelScalar(float fLevel, Guid pguidEventContext);

    int GetMasterVolumeLevel(out float pfLevelDB);

    int GetMasterVolumeLevelScalar(out float pfLevel);

    int SetChannelVolumeLevel(uint nChannel, float fLevelDB, Guid pguidEventContext);

    int SetChannelVolumeLevelScalar(uint nChannel, float fLevel, Guid pguidEventContext);

    int GetChannelVolumeLevel(uint nChannel, out float pfLevelDB);

    int GetChannelVolumeLevelScalar(uint nChannel, out float pfLevel);

    int SetMute(bool bMute, Guid pguidEventContext);

    int GetMute(out bool pbMute);

    int GetVolumeStepInfo(out uint pnStep, out uint pnStepCount);

    int VolumeStepUp(Guid pguidEventContext);

    int VolumeStepDown(Guid pguidEventContext);

    int QueryHardwareSupport(out uint pdwHardwareSupportMask);

    int GetVolumeRange(out float pflVolumeMindB, out float pflVolumeMaxdB, out float pflVolumeIncrementdB);

  }

  [ComImport, Guid(\"1CB9AD4C-DBFA-4C32-B178-C2F568A703B2\")]

  class MMDeviceEnumerator { }

  enum EDataFlow { eRender, eCapture, eAll }

  enum ERole { eConsole, eMultimedia, eCommunications }

  [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid(\"A95664D2-9614-4F35-A746-DE8DB63617E6\")]

  interface IMMDeviceEnumerator {

      int NotImpl1();

      int GetDefaultAudioEndpoint(EDataFlow dataFlow, ERole role, out IMMDevice ppDevice);

  }

  [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid(\"D666063F-1587-4E43-81F1-B948E807363F\")]

  interface IMMDevice {

      int Activate(ref Guid iid, int dwClsCtx, IntPtr pActivationParams, out IAudioEndpointVolume ppInterface);

  }

'@;

  Add-Type -Namespace CoreAudio -Name Audio -MemberDefinition $sig;

  $enum = New-Object CoreAudio.MMDeviceEnumerator

  $dev  = $null

  $null = ([CoreAudio.IMMDeviceEnumerator]$enum).GetDefaultAudioEndpoint([int]0,[int]0,[ref]$dev)

  $iid  = [Guid]::Parse('5CDF2C82-841E-4546-9722-0CF74078229A')

  $vol  = $null

  $CLSCTX_INPROC_SERVER = 1

  $null = $dev.Activate([ref]$iid, $CLSCTX_INPROC_SERVER, [IntPtr]::Zero, [ref]$vol)

  # Unmute + set to 80%

  $vol.SetMute($false, [Guid]::Empty)    | Out-Null

  $vol.SetMasterVolumeLevelScalar(0.8, [Guid]::Empty) | Out-Null

"

echo.

echo ✅ Speakers unmuted and volume set to 80%%.

echo.

pause