Android 包含 javax.sound.sampled.*
对于 Android 应用程序（适用于 Android 版本 2.1），我想分析声音文件并获取频率。因此，我想为此目的包含 javax.sound.sampled.* 。我怎样才能得到它？任何外部 jar 文件可以为我做到这一点吗？有这样的jar文件吗？
For an Android app (for Android version 2.1),I want to analysis a sound file and get the frequency. Therefore I want to include javax.sound.sampled.* for that purpose. How can I get that? Any external jar file can do it for me? Any such jar file is available?
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安卓不支持:(
Android does not support it :(
快速傅里叶变换 (FFT) 库应该可以满足您的目的。不幸的是我不能推荐任何，因为我自己没有尝试过。
A Fast Fourier Transform (FFT) library should be usable for your purpose. Unfortunately I cannot recommend any as I haven't tried them myself.
经过大量的谷歌搜索，终于偶然发现了这个用纯java编写的FFT库，在Android上运行得很好： http://moonblink.googlecode.com/svn/trunk/HermitLibrary/doc/ca/uol/aig/fftpack/package-summary.html
请注意，您将需要来自隐士图书馆也是如此，但非常简单。它的速度足够快，我可以对立体声流进行 FFT、操纵频谱并实时重新合成音频 :-D
After lots of google searching, finally stumbled across this FFT library, written in pure java, works works great on Android: http://moonblink.googlecode.com/svn/trunk/HermitLibrary/doc/ca/uol/aig/fftpack/package-summary.html
Note that you will need some other bits from the hermitlibrary as well, but it's pretty straightforward. It's fast enough that I can FFT a stereo stream, manipulate the spectrum, and re-synthesise the audio in realtime :-D