blocks|key|1119170|text|在将文件的其余数据转储到缓冲区之前，是否跳过了文件的前44个字节？前44个字节是波头，如果你想播放它们，它们听起来像是随机噪声。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1119171|此外，您确定您正在创建的AudioTrack与您尝试播放的WAVE具有相同的属性(采样率、比特率、通道数等)？Windows实际上很好地在文件属性页面中为您提供了此信息：|1119172|📷|atomic|offset|length|1119173|​|1119174|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/7ed0e3e33fcb74424669d922db95cb7e.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|V|8|@]|9|@$G|W|H|X|1|Y]]|A|$]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R|S|-4]]]]

Are you skipping the first 44 bytes of the file before you dump the rest of the file's data into the buffer? The first 44 bytes are the WAVE header and they would sound like random noise if you tried to play them.

Also, are you sure you are creating the AudioTrack with the same properties as the WAVE you are trying to play (sample rate, bit rate, number of channels, etc)? Windows actually does a good job of giving this information to you in the File Properties page:
<img src="https://i.stack.imgur.com/yWNeo.png" alt="alt text">

blocks|key|904450|text|我偶然发现了答案(坦率地说，通过尝试&%5E@！我没想到会成功)，如果有人感兴趣的话...在我的原始代码(源自原始post中链接中的示例)中，数据是从文件中读取的，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|904451|++++InputStream+++++++++++++is++=+new+FileInputStream+++++++(file);
++++BufferedInputStream+++++bis+=+new+BufferedInputStream+++(is,+8000);
++++DataInputStream+++++++++dis+=+new+DataInputStream+++++++(bis);++++++//++Create+a+DataInputStream+to+read+the+audio+data+from+the+saved+file

++++int+i+=+0;++++++++++++++++++++++++++++++++++++++++++++++++++++++++++//++Read+the+file+into+the+"music"+array
++++while+(dis.available()+>+0)
++++{
++++++++music[i]+=+dis.readShort();+++++++++++++++++++++++++++++++++++++//++This+assignment+does+not+reverse+the+order
++++++++i%2B%2B;
++++}

++++dis.close();++++++++++++++++++++++++++++++++++++++++++++++++++++++++//++Close+the+input+stream|code-block|syntax|javascript|904452|在这个版本中，music[]是SHORTS的数组。因此，readShort()方法在这里似乎是有意义的，因为数据是16位的PCM…然而，在Android上，这似乎是问题所在。我将该代码更改为以下代码：|904453|+++++music=new+byte[(int)+file.length()];//size+&+length+of+the+file
++++InputStream+++++++++++++is++=+new+FileInputStream+++++++(file);
++++BufferedInputStream+++++bis+=+new+BufferedInputStream+++(is,+8000);
++++DataInputStream+++++++++dis+=+new+DataInputStream+++++++(bis);++++++//++Create+a+DataInputStream+to+read+the+audio+data+from+the+saved+file

++++int+i+=+0;++++++++++++++++++++++++++++++++++++++++++++++++++++++++++//++Read+the+file+into+the+"music"+array
++++while+(dis.available()+>+0)
++++{
++++++++music[i]+=+dis.readByte();++++++++++++++++++++++++++++++++++++++//++This+assignment+does+not+reverse+the+order
++++++++i%2B%2B;
++++}

++++dis.close();++++++++++++++++++++++++++++++++++++++++++++++++++++++++//++Close+the+input+stream|904454|在这个版本中，music[]是一个字节数组。我仍然告诉AudioTrack它是16位的PCM数据，而且我的安卓系统似乎不存在将字节数组写入这样配置的AudioTrack的问题……不管怎样，这听起来是对的，所以如果其他人想在他们的Android上播放Windows的声音，出于某种原因，这就是解决方案。啊，Endianness......|904455|R.|904456|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I stumbled on the answer (frankly, by trying &amp;^@! I didn't think would work), in case anybody's interested... In my original code (which is derived from the example in the link in the original post), the data is read from the file like so:

<pre><code> InputStream is = new FileInputStream (file);
 BufferedInputStream bis = new BufferedInputStream (is, 8000);
 DataInputStream dis = new DataInputStream (bis); // Create a DataInputStream to read the audio data from the saved file

 int i = 0; // Read the file into the "music" array
 while (dis.available() &gt; 0)
 {
 music[i] = dis.readShort(); // This assignment does not reverse the order
 i++;
 }

 dis.close(); // Close the input stream
</code></pre>

In this version, music[] is array of SHORTS. So, the readShort() method would seem to make sense here, since the data is 16-bit PCM... However, on the Android that seems to be the problem. I changed that code to the following:

<pre><code> music=new byte[(int) file.length()];//size &amp; length of the file
 InputStream is = new FileInputStream (file);
 BufferedInputStream bis = new BufferedInputStream (is, 8000);
 DataInputStream dis = new DataInputStream (bis); // Create a DataInputStream to read the audio data from the saved file

 int i = 0; // Read the file into the "music" array
 while (dis.available() &gt; 0)
 {
 music[i] = dis.readByte(); // This assignment does not reverse the order
 i++;
 }

 dis.close(); // Close the input stream
</code></pre>

In this version, music[] is an array of BYTES. I'm still telling the AudioTrack that it's 16-bit PCM data, and my Android doesn't seem to have a problem with writing an array of bytes into an AudioTrack thus configured... Anyway, it finally sounds right, so if anyone else wants to play Windows sounds on their Android, for some reason, that's the solution. Ah, Endianness......

R.

blocks|key|1119291|text|正如Aaron+C所说的，你必须跳过最初的44个字节，或者(我更喜欢的)读取前44个字节，它们是波头。这样你就可以知道有多少通道，每个样本的位数，长度等。该波包含。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1119292|Here你可以找到一个很好的波头解析器/写入器的实现。|1119293|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/411500/aaron-c|1|http://alvinalexander.com/java/jwarehouse/android/core/java/android/speech/srec/WaveHeader.java.shtml^0|2|7|0|0|0|4|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

As said by <a href="https://stackoverflow.com/users/411500/aaron-c">Aaron C</a>, you have to skip initial 44 bytes or (as I prefer) read first 44 bytes that are the WAVE header. In this way you know how many channels, bits per sample, length, etc... the WAVE contains.

<a href="http://alvinalexander.com/java/jwarehouse/android/core/java/android/speech/srec/WaveHeader.java.shtml" rel="nofollow noreferrer">Here</a> you can find a good implementation of a WAVE header parser/writer.

blocks|key|904570|text|对于这个问题，我找到了很多长长的答案。我的最终解决方案，考虑到所有的剪切和粘贴都不是我的，归结为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|904571|public+boolean+play()+{

++++int+i+=+0;
++++byte[]+music+=+null;
++++InputStream+is+=+mContext.getResources().openRawResource(R.raw.noise);

++++at+=+new+AudioTrack(AudioManager.STREAM_MUSIC,+44100,
++++++++AudioFormat.CHANNEL_CONFIGURATION_MONO,+AudioFormat.ENCODING_PCM_16BIT,
++++++++minBufferSize,+AudioTrack.MODE_STREAM);

++++try{
++++++++music+=+new+byte[512];
++++++++at.play();

++++++++while((i+=+is.read(music))+!=+-1)
++++++++++++at.write(music,+0,+i);

++++}+catch+(IOException+e)+{
++++++++e.printStackTrace();
++++}

++++at.stop();
++++at.release();
++++return+STOPPED;
}|code-block|syntax|javascript|904572|STOPPED只是作为重置暂停/播放按钮的信号返回的"true“。在类初始化器中：|904573|public+Mp3Track(Context+context)+{
++++mContext+=+context;
++++minBufferSize+=+AudioTrack.getMinBufferSize(44100,
++++++++AudioFormat.CHANNEL_CONFIGURATION_MONO,+AudioFormat.ENCODING_PCM_16BIT);
}|904574|上下文就是来自调用活动的"this“。您可以在SD卡上使用FileInputStream，等等。我的文件在res/raw中|904575|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I found a lot of long answers to this question. My final solution, which given all the cutting and pasting is hardly mine, comes down to:

<pre><code>public boolean play() {

 int i = 0;
 byte[] music = null;
 InputStream is = mContext.getResources().openRawResource(R.raw.noise);

 at = new AudioTrack(AudioManager.STREAM_MUSIC, 44100,
 AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT,
 minBufferSize, AudioTrack.MODE_STREAM);

 try{
 music = new byte[512];
 at.play();

 while((i = is.read(music)) != -1)
 at.write(music, 0, i);

 } catch (IOException e) {
 e.printStackTrace();
 }

 at.stop();
 at.release();
 return STOPPED;
}
</code></pre>

STOPPED is just a "true" sent back as a signal to reset the pause/play button.
And in the class initializer:

<pre><code>public Mp3Track(Context context) {
 mContext = context;
 minBufferSize = AudioTrack.getMinBufferSize(44100,
 AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
}
</code></pre>

Context is just "this" from the calling activity.
You can use a FileInputStream on the sdcard, etc. My files are in res/raw

blocks|key|904626|text|请不要使糟糕的解析代码永久化。WAV解析对于实现http://soundfile.sapp.org/doc/WaveFormat/来说是微不足道的，您将会感谢自己能够解析诸如采样率、位深度和通道数量之类的东西。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|904627|此外，x86和ARM+(至少在默认情况下)都是小端，因此本机端WAV文件应该没有任何混洗。|904628|entityMap|0|LINK|mutability|MUTABLE|url|http://soundfile.sapp.org/doc/WaveFormat/^0|O|15|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Please don't perpetuate terrible parsing code. WAV parsing is trivial to implement
<a href="http://soundfile.sapp.org/doc/WaveFormat/" rel="nofollow">http://soundfile.sapp.org/doc/WaveFormat/</a>
and you will thank yourself by being able to parse things such as the sampling rate, bit depth, and number of channels.

Also x86 and ARM (at least by default) are both little endian , so native-endian WAV files should be fine without any shuffling.

blocks|key|904651|text|示例wav文件：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|904652|http://www.mauvecloud.net/sounds/pcm1644m.wav|offset|length|904653|示例代码：|904654|public+class+AudioTrackPlayer+{
++++Context+mContext;
++++int+minBufferSize;
++++AudioTrack+at;
++++boolean+STOPPED;

++++public+AudioTrackPlayer(Context+context)+{
++++++++Log.d("------","init");
++++++++mContext+=+context;
++++++++minBufferSize+=+AudioTrack.getMinBufferSize(44100,
++++++++++++++++AudioFormat.CHANNEL_CONFIGURATION_MONO,+AudioFormat.ENCODING_PCM_16BIT);
++++}

++++public+boolean+play()+{
++++++++Log.d("------","play");
++++++++int+i+=+0;
++++++++byte[]+music+=+null;
++++++++InputStream+is+=+mContext.getResources().openRawResource(R.raw.pcm1644m);

++++++++at+=+new+AudioTrack(AudioManager.STREAM_MUSIC,+44100,
++++++++++++++++AudioFormat.CHANNEL_CONFIGURATION_MONO,+AudioFormat.ENCODING_PCM_16BIT,
++++++++++++++++minBufferSize,+AudioTrack.MODE_STREAM);
++++++++try+{
++++++++++++music+=+new+byte[512];
++++++++++++at.play();

++++++++++++while+((i+=+is.read(music))+!=+-1)
++++++++++++++++at.write(music,+0,+i);

++++++++}+catch+(IOException+e)+{
++++++++++++e.printStackTrace();
++++++++}
++++++++at.stop();
++++++++at.release();
++++++++return+STOPPED;
++++}
}|code-block|syntax|javascript|904655|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|19|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Z|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|C]]]]

Sample wav file: 
<a href="http://www.mauvecloud.net/sounds/pcm1644m.wav" rel="nofollow noreferrer">http://www.mauvecloud.net/sounds/pcm1644m.wav</a> 

Sample Code:

<pre><code>public class AudioTrackPlayer {
 Context mContext;
 int minBufferSize;
 AudioTrack at;
 boolean STOPPED;

 public AudioTrackPlayer(Context context) {
 Log.d("------","init");
 mContext = context;
 minBufferSize = AudioTrack.getMinBufferSize(44100,
 AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
 }

 public boolean play() {
 Log.d("------","play");
 int i = 0;
 byte[] music = null;
 InputStream is = mContext.getResources().openRawResource(R.raw.pcm1644m);

 at = new AudioTrack(AudioManager.STREAM_MUSIC, 44100,
 AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT,
 minBufferSize, AudioTrack.MODE_STREAM);
 try {
 music = new byte[512];
 at.play();

 while ((i = is.read(music)) != -1)
 at.write(music, 0, i);

 } catch (IOException e) {
 e.printStackTrace();
 }
 at.stop();
 at.release();
 return STOPPED;
 }
}
</code></pre>

blocks|key|904691|text|只需确认在AudioTrack构造函数中是否有AudioTrack.MODE_STREAM而不是AudioTrack.MODE_STATIC：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|904692|AudioTrack+at+=+new+AudioTrack(
++AudioManager.STREAM_MUSIC,
++sampleRate,
++AudioFormat.CHANNEL_IN_STEREO,
++AudioFormat.ENCODING_PCM_16BIT,
++//+buffer+length+in+bytes
++outputBufferSize,
++AudioTrack.MODE_STREAM
);|code-block|syntax|javascript|904693|entityMap^0|5|A|N|M|1C|M|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

Just confirm if you have <code>AudioTrack.MODE_STREAM</code> and not <code>AudioTrack.MODE_STATIC</code> in the <code>AudioTrack</code> constructor:

<pre><code>AudioTrack at = new AudioTrack(
 AudioManager.STREAM_MUSIC,
 sampleRate,
 AudioFormat.CHANNEL_IN_STEREO,
 AudioFormat.ENCODING_PCM_16BIT,
 // buffer length in bytes
 outputBufferSize,
 AudioTrack.MODE_STREAM
);
</code></pre>

I'm working with Android, trying to make my AudioTrack application play a Windows .wav file (Tada.wav). Frankly, it shouldn't be this hard, but I'm hearing a lot of strange stuff. The file is saved on my phone's mini SD card and reading the contents doesn't seem to be a problem, but when I play the file (with parameters I'm only PRETTY SURE are right), I get a few seconds of white noise before the sound seems to resolve itself into something that just may be right.

I have successfully recorded and played my own voice back on the phone -- I created a .pcm file according to the directions in this example:

<a href="http://emeadev.blogspot.com/2009/09/raw-audio-manipulation-in-android.html" rel="noreferrer">http://emeadev.blogspot.com/2009/09/raw-audio-manipulation-in-android.html</a>

(without the backwards masking)...

Anybody got some suggestions or awareness of an example on the web for playing a .wav file on an Android??

Thanks,
R.

Using AudioTrack in Android to play a WAV file

我正在使用Android，试图让我的AudioTrack应用程序播放Windows .wav文件(Tada.wav)。坦率地说，这不应该这么难，但我听到了很多奇怪的事情。文件被保存在我手机的迷你SD卡上，读取文件内容似乎不是问题，但当我播放文件(参数我只确定是正确的)时，我得到了几秒钟的白噪声，然后声音似乎自动解析为可...

问使用Android中的AudioTrack播放WAV文件
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