利用NAudio实现对音频设备的控制（静音、音量调节）

安装

Install-Package NAudio

代码

using NAudio.CoreAudioApi;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Runtime.InteropServices;

namespace CgdataBase;

public class AudioController
{
    private static readonly NLog.Logger _logger = NLog.LogManager.GetCurrentClassLogger();
    private MMDevice? _device = null;

    /// <summary>
    /// 初始化设备
    /// </summary>
    public void MuteInit()
    {
        if (IsInit() == false)
        {
            GetMMDevice(out _);
        }
    }

    /// <summary>
    /// 判断是否已初始化
    /// </summary>
    /// <returns></returns>
    public bool IsInit()
    {
        return _device != null;
    }

    /// <summary>
    /// 判断系统是否静音
    /// </summary>
    /// <returns></returns>
    public bool IsMuted()
    {
        if (GetMMDevice(out var device))
        {
            return device.AudioEndpointVolume.Mute;
        }

        return true;
    }

    /// <summary>
    /// 获取音频设备
    /// </summary>
    /// <param name="device"></param>
    /// <returns>返回true表示获取成功，返回false表示获取失败</returns>
    private bool GetMMDevice([NotNullWhen(true)] out MMDevice? device)
    {
        if (_device != null)
        {
            device = _device;
            return true;
        }

        var devEnum = new MMDeviceEnumerator();
        var devices = devEnum.EnumerateAudioEndPoints(DataFlow.Render, DeviceState.Active);
        if (devices.Count > 0)
        {
            try
            {
                _device = devEnum.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
            }
            catch (COMException ex)
            {
                _logger.Error(ex);
                _device = devices?.FirstOrDefault();
            }
        }

        device = _device;
        return device != null;
    }

    /// <summary>
    /// 设置静音
    /// </summary>
    public void SetMute()
    {
        if (GetMMDevice(out var device))
            device.AudioEndpointVolume.Mute = true;
    }

    /// <summary>
    /// 取消静音
    /// </summary>
    public void SetUnMute()
    {
        if (GetMMDevice(out var device))
            device.AudioEndpointVolume.Mute = false;
    }

    /// <summary>
    /// 设置音量大小，范围0-1
    /// </summary>
    /// <param name="volume"></param>
    /// <exception cref="ArgumentOutOfRangeException"></exception>
    public void SetVolume(float volume)
    {
        if (volume < 0 || volume > 1)
        {
            throw new ArgumentOutOfRangeException(nameof(volume), "Volume must be between 0 and 1.");
        }
        if (GetMMDevice(out var device))
            device.AudioEndpointVolume.MasterVolumeLevelScalar = volume;
    }

    /// <summary>
    /// 获取当前音量大小，范围0-1，如果获取失败则返回null
    /// </summary>
    /// <returns></returns>
    public float? GetVolume()
    {
        if (GetMMDevice(out var device))
            return device.AudioEndpointVolume.MasterVolumeLevelScalar;

        return null;
    }
}