声音皈依到频率的android [英] Sound convertion to frequency in android

问题描述

可能重复：
  实时基音检测
  <一href="http://stackoverflow.com/questions/3904488/determine-the-audio-frequency-of-sound-received-via-the-microphone">Determine声音的音频经由麦克风的接收

Possible Duplicate:
Real time pitch detection
Determine the audio frequency of sound received via the microphone

我发展我自己的Andr​​oid的吉他调谐器。在这里，我将不得不使用吉他音符的频率。因此，我想知道如何通过MIC端口传来的声音转换成其频率在Android的？

I'm developing my own android guitar tuner. Here I will have to use the guitar note frequency. Therefore, I want to know how to convert the sound coming through the mic port into its frequency in android?

推荐答案

编辑：链接死了---这个问题已经解决了<一href="http://netscale.cse.nd.edu/twiki/pub/Main/Projects/Analyze_the_frequency_and_strength_of_sound_in_Android.pdf"相对=nofollow>这里 ---

link dead ---This problem is already solved here---

我要总结论文：

1. 记录的东西：

1. Record stuff :

    int minSize = AudioRecord.getMinBufferSize(sampleRate,AudioFormat.
    CHANNEL_CONFIGURATION_MONO,
    AudioFormat.ENCODING_PCM_16BIT);
    AudioRecord audioInput = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate,
    AudioFormat.CHANNEL_CONFIGURATION_MONO,
    AudioFormat.ENCODING_PCM_16BIT);
    minSize);
    ...
    short[] buffer = new short[readSize];
    audioInput.startRecording();
    audioInput.read(buffer, index, readSize); // record data from mic into buffer

使用FFT Anayze频率。

Anayze the frequency using FFT.

我说你录制应用FFT就可以了约4秒。像hotpaw2说你必须使用间距估计算法来确定录制的声音从乱弹的频率范围。

I'd say you record about 4 seconds of apply FFT on it. Like hotpaw2 says you have to use pitch estimation algorithms to determine the range of frequencies in recorded sound from the strum.

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