如何在Android中录制音频时调整麦克风灵敏度 [英] How to adjust microphone sensitivity while recording audio in android

问题描述

我正在制作录音应用程序。在app中我有一个Seekbar来改变输入语音增益。
我找不到任何调整输入语音增益的方法。

I am working on a voice recording app. in app I have a Seekbar to change input voice gain. I could not found any way to adjust input voice gain.

我正在使用AudioRecord课程录制语音。

I am using AudioRecord class to record voice.

 recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
            RECORDER_SAMPLERATE, RECORDER_CHANNELS,
            RECORDER_AUDIO_ENCODING, bufferSize);

    recorder.startRecording();

我在Play商店看到了一个使用此功能的应用程序。

I have seen an app also in play store which are using this functionality.

https://play.google.com/store/apps/details?id=com.grace.microphone

推荐答案

据我所知，您不需要任何自动调整，只需手动从UI进行操作。 Android中没有内置功能，您必须手动修改数据。

As I understand you don't want any automatic adjustments, only manual from the UI. There is no built-in functionality for this in Android, instead you have to modify your data manually.

假设您使用 read（short [] audioData，int offsetInShorts，int sizeInShorts）用于阅读流。所以你应该做这样的事情：

Suppose you use read (short[] audioData, int offsetInShorts, int sizeInShorts) for reading the stream. So you should just do something like this:

float gain = getGain(); // taken from the UI control, perhaps in range from 0.0 to 2.0
int numRead = read(audioData, 0, SIZE);
if (numRead > 0) {
    for (int i = 0; i < numRead; ++i) {
        audioData[i] = (short)Math.min((int)(audioData[i] * gain), (int)Short.MAX_VALUE);
    }
}

Math.min 增益大于1，code>用于防止溢出。

Math.min is used to prevent overflow if gain is greater than 1.

这篇关于如何在Android中录制音频时调整麦克风灵敏度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！