改变音高录制的音频和频率

本文介绍了改变音高录制的音频和频率的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我一直在试图用code从以下调整记录一段音频的音调：

developer.android/guide/topics/媒体/音频capture.html

我的猜测是，这一调整应与完成的 MediaRecorder 。

developer.android/reference/android/media/ MediaRecorder.html

不过，我不能确定打电话来改变音调哪种方法？

翻翻所以，我发现changing在Android的一个音效档的频率，但我很困惑，如何整合的Soundpool 与我下面的音频捕获导向的元素。有基于开发指南我使用的是更简单的解决方案？

解决方案

mAudioManager =（AudioManager）context.getSystemService（Context.AUDIO_SERVICE）; mSoundPool =新的Soundpool（大小，AudioManager.STREAM_MUSIC，0）; mSoundPoolMap =新的HashMap＆LT;整数，整数GT;（）; mSoundPoolMap.put（索引，mSoundPool.load（上下文，R.raw.sound，1））; mSoundPool.play（ID，streamVolume，streamVolume，1，循环，1F）;

的频率是第1f一部分。如果您将其更改为.5f和2.0f之间的值，应该减速或加速样本，从而改变音高。

下面是从我的应用程序之一约code：

私人的Soundpool的Soundpool;     私人的HashMap＆LT;整数，整数GT; soundsMap;     保护无效的onCreate（包savedInstanceState）{ 的Soundpool =新的Soundpool（4，AudioManager.STREAM_MUSIC，1​​00）;         soundsMap =新的HashMap＆LT;整数，整数GT;（）;         soundsMap.put（cowbell1，soundpool.load（此，R.raw.cowbell，1））;         soundsMap.put（cowbell2，soundpool.load（此，R.raw.cowbell1，1））;         soundsMap.put（cowbell3，soundpool.load（此，R.raw.windhh3，1））; }     公共无效playSound（INT声音，浮动fSpeed​​）{     AudioManager经理=（AudioManager）getSystemService（Context.AUDIO_SERVICE）;     浮streamVolumeCurrent = mgr.getStreamVolume（AudioManager.STREAM_MUSIC）;     浮streamVolumeMax = mgr.getStreamMaxVolume（AudioManager.STREAM_MUSIC）;     浮动量= streamVolumeCurrent / streamVolumeMax;     soundpool.play（soundsMap.get（音），音量，音量，1，0，fSpeed​​）;    }

要叫我用这样的声音：

playSound（cowbell1，1.0F）; 要么                 playSound（cowbell2，1.0F）;

的速率可以通过改变1.0F值被改变。

如果您仍然有后您的code麻烦，我会看看吧。

I've been trying to adjust the pitch of a record piece of audio following with code from:

developer.android/guide/topics/media/audio-capture.html

My guess is that this adjustment should be done with the MediaRecorder.

developer.android/reference/android/media/MediaRecorder.html

However, I am unsure which method to call to change the pitch?

Looking through SO, I found changing the frequency of a soundfile in android but I am confused as to how to integrate a SoundPool with the elements in the audio capture guide I am following. Is there a more straightforward solution based on the developer guide I am using?

解决方案

mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); mSoundPool = new SoundPool(size, AudioManager.STREAM_MUSIC, 0); mSoundPoolMap = new HashMap<Integer, Integer>(); mSoundPoolMap.put(index, mSoundPool.load(context, R.raw.sound, 1)); mSoundPool.play(id, streamVolume, streamVolume, 1, loop, 1f);

The frequency is the 1f part. If you change it to a value between .5f and 2.0f that should slow down or speed up the sample, which changes the pitch.

Here's some code from one of my apps:

private SoundPool soundpool; private HashMap<Integer, Integer> soundsMap; protected void onCreate(Bundle savedInstanceState) { soundpool = new SoundPool(4, AudioManager.STREAM_MUSIC, 100); soundsMap = new HashMap<Integer, Integer>(); soundsMap.put(cowbell1, soundpool.load(this, R.raw.cowbell, 1)); soundsMap.put(cowbell2, soundpool.load(this, R.raw.cowbell1, 1)); soundsMap.put(cowbell3, soundpool.load(this, R.raw.windhh3, 1)); } public void playSound(int sound, float fSpeed) { AudioManager mgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE); float streamVolumeCurrent = mgr.getStreamVolume(AudioManager.STREAM_MUSIC); float streamVolumeMax = mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC); float volume = streamVolumeCurrent / streamVolumeMax; soundpool.play(soundsMap.get(sound), volume, volume, 1, 0, fSpeed); }

To call a sound I use this:

playSound(cowbell1, 1.0f); or playSound(cowbell2, 1.0f);

The rate can be changed by altering the 1.0f value.

If you're still having trouble post your code and I'll have a look at it.