How to split a wav file into smaller chunks using Java?

Question

I have a very huge WAV file, about 100MB in size. I would like to use Java to read this wav file and split it into smaller chunks for every 2 seconds of audio.

Is it possible to do this in Java? Could you please suggest me an API with which I can achieve it?

Thanks in advance, Snehal

Answer 1

You can use AudioInputStream and its AudioFileFormat member (which contains an AudioFormat instance) to know what to write (format, sample rate), you can use AudioSystem to write it.

Based on the sample rate of the format you can find out how many bytes of audio are 2 seconds, and go on a loop of reading that many bytes from the AudioInputStream, writing them to a new file.

Answer 2

If you don't care about the longevity of your code, then Quicktime For Java is a good bet for media. It runs on Windows and Mac and will read and write pretty much any audio (and video) format. The downside is that Apple have not supported it for years, so while it still works, you're investing in a dying technology.

Answer 3

You could also look up the specification for a wav file which is really basic and simple. And then binary read the file, and save it again in smaller bits.

I think it's a better learning experience to do it this way instead of always relying on libraries.