- Ubuntu
(24)
https://www.st.itc.keio.ac.jp/ja/faq_linux_audio_mute_st.html
amixer sget Master
amixer sset Master 50%
- Debian
(13)
amixer sget Master
amixer sset Master 50%
※rootユーザで実行すると、下記エラーとなる
amixer: Mixer attach default error: Host is down
- CentOS
(RL9)
amixer sget Master
amixer sset Master 50%
- Windows Server
(2025)
https://ehbtj.com/info/control-volume-mixer-from-command-line/
https://nibikitune.com/pc/nircmd-2
.\nircmd.exe setappvolume thunderbird.exe 0.5
.\nircmd.exe setsysvolume 25000
https://www.egao-inc.co.jp/tech/windows_powershell_volume_mute/
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 AudioControl
{
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)); }
}
}
'@
[AudioControl]::Volume = 0.5 # 0.2 = 20%, etc.
[AudioControl]::Mute = $false # Set to $false to un-mute
