使用NAudio获取默认的输出音频设备 [英] Get default output audio device with NAudio

问题描述

我想使用NAudio获取默认的输出音频设备(即我的扬声器)，以获取

I want to get the default output audio device (i.e. my speakers) using NAudio, to get the master sound volume as in this question.

我正在尝试使用MMDeviceEnumerator.GetDevice()，但是它使用的ID是一个字符串，而不是设备号.这是我到目前为止编写的代码:

I am trying to use MMDeviceEnumerator.GetDevice(), but the id it takes is a string, not the device number. Here's the code I've written so far:

        var enumerator = new MMDeviceEnumerator();

        for (int i = 0; i < WaveOut.DeviceCount; i++)
        {
            var cap = WaveOut.GetCapabilities(i);
            Console.WriteLine("{0}: {1}", i, cap.ProductName);

            var device = enumerator.GetDevice(???);
        }

        Console.WriteLine();

        Console.ReadLine();

我尝试将各种Guid从功能以及字符串格式的设备ID传递给GetDevice()，但是它们都不起作用.

I've tried passing the various Guids from the capabilities, as well as the device id in string format, to GetDevice() but none of them work.

如何获取默认设备?

推荐答案

您在这里混合使用了两种完全不同的音频API. MMDeviceEnumerator是WASAPI的一部分，WASAPI是WindowsVista中引入的新音频API，WaveOut.DeviceCount使用旧的Windows音频API.

You are mixing two completely different audio APIs here. MMDeviceEnumerator is part of WASAPI, the new audio API introduced in WindowsVista, and WaveOut.DeviceCount uses the old Windows audio APIs.

要使用WASAPI来获取默认的音频设备，请使用以下代码:

To use WASAPI to get the default audio device, you use code like this:

var enumerator = new MMDeviceEnumerator();
enumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Console);

实际上有三种不同类型的默认音频输出设备，具体取决于目的(角色):

There are actually three different types of default audio output device, depending on the purpose (role):

    /// <summary>
    /// Games, system notification sounds, and voice commands.
    /// </summary>
    Console,

    /// <summary>
    /// Music, movies, narration, and live music recording
    /// </summary>
    Multimedia,

    /// <summary>
    /// Voice communications (talking to another person).
    /// </summary>
    Communications,

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