blocks|key|1359223|text|你看过JSyn吗？我不认为Java+Core库可以做您想要的事情。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1359224|entityMap|0|LINK|mutability|MUTABLE|url|http://www.softsynth.com/jsyn/^0|3|4|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Have you looked at <a href="http://www.softsynth.com/jsyn/" rel="nofollow noreferrer">JSyn</a>? I don't think the Java Core libraries can do what you want.

blocks|key|1359356|text|参见Java+Sound+API。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1359357|再看一看，我也找到了Jass。|1359358|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/products/java-media/sound/|1|http://people.cs.ubc.ca/~kvdoel/jass/^0|2|E|0|0|A|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]]]]

See <a href="http://java.sun.com/products/java-media/sound/" rel="nofollow noreferrer" title="Java Sound API">Java Sound API</a>.

Looking a bit more, I also found <a href="http://people.cs.ubc.ca/~kvdoel/jass/" rel="nofollow noreferrer" title="Jass demos">Jass</a>.

blocks|key|1359400|text|This+Sun+forum+post有一些用于生成正弦音调的有趣代码。此外，鉴于WAV文件格式不是非常复杂，您可以创建一个表示所需波形的表，然后将其写入文件。有几个例子，例如a+raw+audio+converter和how+to+write+a+wav+file。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1359401|entityMap|0|LINK|mutability|MUTABLE|url|http://forums.sun.com/thread.jspa?threadID=5243872|1|http://www.jsresources.org/examples/RawAudioDataConverter.html|2|http://forums.sun.com/thread.jspa?threadID=5313445^0|0|J|0|2G|L|1|32|N|2|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]|N|$5|G|H|I|C|$J|O]]]]

<a href="http://forums.sun.com/thread.jspa?threadID=5243872" rel="nofollow noreferrer">This Sun forum post</a> has some interesting code for generating sin tones. Also, given that the WAV file format is not overly complicated, you could create a table representing the desired waveform and then write it to a file. There are a few examples around, e.g. <a href="http://www.jsresources.org/examples/RawAudioDataConverter.html" rel="nofollow noreferrer">a raw audio converter</a> and <a href="http://forums.sun.com/thread.jspa?threadID=5313445" rel="nofollow noreferrer">how to write a wav file</a>.

blocks|key|1144386|text|Jcollider是SuperCollider合成服务器的Java接口。如果你想合成音乐，这将使事情变得更容易(它将音调生成器抽象为合成器，负责图形生成，从合成图中删除静音合成，直到再次需要它们，在合成图之间动态修补信号，等等)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1144387|entityMap|0|LINK|mutability|MUTABLE|url|http://www.sciss.de/jcollider/^0|0|9|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://www.sciss.de/jcollider/" rel="nofollow noreferrer">Jcollider</a> is a Java interface to the SuperCollider synthesis server. If you want to synthesize music, this will make things much easier (it abstracts away from the tone generator to a synthesizer, takes care of things like graph generation, deleting muted synths from the synthesis graph until they are needed again, patching signals between synths dynamically, etc.).

blocks|key|1144401|text|最简单的方法是使用java内置的MIDI库：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1144402|int+channel+=+0;+//+0+is+a+piano,+9+is+percussion,+other+channels+are+for+other+instruments

++++int+volume+=+80;+//+between+0+et+127
++++int+duration+=+200;+//+in+milliseconds

++++try+{
++++++++Synthesizer+synth+=+MidiSystem.getSynthesizer();
++++++++synth.open();
++++++++MidiChannel[]+channels+=+synth.getChannels();

++++++++//+--------------------------------------
++++++++//+Play+a+few+notes.
++++++++//+The+two+arguments+to+the+noteOn()+method+are:
++++++++//+"MIDI+note+number"+(pitch+of+the+note),
++++++++//+and+"velocity"+(i.e.,+volume,+or+intensity).
++++++++//+Each+of+these+arguments+is+between+0+and+127.
++++++++channels[channel].noteOn(+60,+volume+);+//+C+note
++++++++Thread.sleep(+duration+);
++++++++channels[channel].noteOff(+60+);
++++++++channels[channel].noteOn(+62,+volume+);+//+D+note
++++++++Thread.sleep(+duration+);
++++++++channels[channel].noteOff(+62+);
++++++++channels[channel].noteOn(+64,+volume+);+//+E+note
++++++++Thread.sleep(+duration+);
++++++++channels[channel].noteOff(+64+);

++++++++Thread.sleep(+500+);

++++++++//+--------------------------------------
++++++++//+Play+a+C+major+chord.
++++++++channels[channel].noteOn(+60,+volume+);+//+C
++++++++channels[channel].noteOn(+64,+volume+);+//+E
++++++++channels[channel].noteOn(+67,+volume+);+//+G
++++++++Thread.sleep(+3000+);
++++++++channels[channel].allNotesOff();
++++++++Thread.sleep(+500+);



++++++++synth.close();
++++}
++++catch+(Exception+e)+{
++++++++e.printStackTrace();
++++}|code-block|syntax|javascript|1144403|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The easiest way to do this is with java's in built MIDI libraries:

<pre><code>int channel = 0; // 0 is a piano, 9 is percussion, other channels are for other instruments

 int volume = 80; // between 0 et 127
 int duration = 200; // in milliseconds

 try {
 Synthesizer synth = MidiSystem.getSynthesizer();
 synth.open();
 MidiChannel[] channels = synth.getChannels();

 // --------------------------------------
 // Play a few notes.
 // The two arguments to the noteOn() method are:
 // "MIDI note number" (pitch of the note),
 // and "velocity" (i.e., volume, or intensity).
 // Each of these arguments is between 0 and 127.
 channels[channel].noteOn( 60, volume ); // C note
 Thread.sleep( duration );
 channels[channel].noteOff( 60 );
 channels[channel].noteOn( 62, volume ); // D note
 Thread.sleep( duration );
 channels[channel].noteOff( 62 );
 channels[channel].noteOn( 64, volume ); // E note
 Thread.sleep( duration );
 channels[channel].noteOff( 64 );

 Thread.sleep( 500 );

 // --------------------------------------
 // Play a C major chord.
 channels[channel].noteOn( 60, volume ); // C
 channels[channel].noteOn( 64, volume ); // E
 channels[channel].noteOn( 67, volume ); // G
 Thread.sleep( 3000 );
 channels[channel].allNotesOff();
 Thread.sleep( 500 );



 synth.close();
 }
 catch (Exception e) {
 e.printStackTrace();
 }
</code></pre>

Note: I do NOT want to "read audio file foo.bar and play it."

I want to programmatically generate audio files on the fly and play them.

Does Java have built in libraries for this, or does this fall into the system-dependent libraries?

Thanks!

Does java have built in libraries for audio _synthesis_?

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注意:我不想“读取音频文件foo.bar并播放它”。我想以编程方式在飞行中生成音频文件并播放它们。Java有没有内置的库来实现这一点，或者这是否属于系统依赖库？谢谢!

问java有内置的音频_synthesis_库吗？
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