从麦克风捕获音频而无需播放 [英] Capture audio from Microphone without playing it back

问题描述

我正在尝试使用麦克风来处理捕获的音频.我设法做到了所有这些，但是有一个问题...我捕获的音频会自动播放给用户，我不想要那样.

I am trying to use a microphone and process the audio captured. I managed to do all that, but I have a problem... My audio captured is automatically played to the user, and I don't want that.

    audioSrc.clip = Microphone.Start(null, true, 1000, 44100);
    while (!(Microphone.GetPosition(null) > 0)) { }
    audioSrc.Play();

我试图禁用音频监听器并降低音频源的音量，但这没用.

I tried to disable the audio listener and lower the volume of the audio source, but that didn't work.

任何人都知道如何在不播放音频的情况下捕获音频吗?

Anyone knows how I can capture audio without playing it back?

void Start()
{
    GameObject a = new GameObject("AudioSource");
    audioSrc = a.AddComponent<AudioSource>();
    Instantiate(a);

    string deviceName = Microphone.devices[0];
    audioSrc.clip = Microphone.Start(deviceName, true, 1000, 44100);
    audioSrc.volume = 0;
    while (!(Microphone.GetPosition(null) > 0)) { }

    audioSrc.Play();
}

void Update()
{
    audioSrc.GetSpectrumData(spectrum, 0, FFTWindow.BlackmanHarris);
    frq = findPitch(spectrum);
    txtFreq.text = "Hz: " + frq;
    trigger.update(Time.deltaTime, frq);
}

推荐答案

任何人都知道如何在不播放音频的情况下捕获音频吗?

Anyone knows how I can capture audio without playing it back?

有两种方法可以做到这一点:

There are two methods to do this:

1 .将音量设置为非常低的数字. 不能为0 . 0.001f的值完全可以.

1.Set the volume to a very low number. This cannot be 0. The value of 0.001f is totally fine.

audioSrc.volume = 0.001f;

在编辑器中工作.除Windows之外，未在任何其他平台上进行测试.如果有问题，请使用方法2.

Works in the Editor. Not tested on any other platform except on Windows. Use method 2 if there is a problem.

2 .使用AudioMixer对其进行处理

2.Use AudioMixer to handle it

如果将音量设置为0.001f并没有完全静音，请使用AudioMixer对其进行修复.

If setting the volume to 0.001f did not completely mute the audio then use AudioMixer to fix it.

A .创建AudioMixer. 资产 ---> 创建 ---> 音频混音器，名称为"MicMixer" .

A.Create AudioMixer. Assets ---> Create ---> Audio Mixer and name is "MicMixer".

B .在混音器下创建新的组，并将其命名为"MuteMic".

B.Create new Group under the Mixer and name it "MuteMic".

C .将静音麦克风" 组的衰减更改为-80.

C.Change the attenuation of that "MuteMic" group to -80.

D .将"MuteMic" 组拖动到Mic的AudioSource的 Output 插槽中.而已. GetOutputData功能正常，扬声器没有声音发出.

D.Drag that "MuteMic" group to your Mic's AudioSource's Output slot. That's it. The GetOutputData function properly without any sound coming out from the speaker.

为此的动画gif:

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