good java library for reading .wavs?

[filip krzysztof tomaszewski aka zambari]

Hi Jeff,

Can you recommend a good library for reading wavs? I want to (some time in the future) write software visualizing samples played on the electribe in real time via midi input to java

I don't want to use audio in as its only one stereo pair and there is no way in sight to allow multiple audio inputs into java (none I know about). So the image drawing would be based in images - as your  software allows easy dumping of the .esx file into numbered .wavs - I could know when a sample change occur and swap for appropriate image. 

I need to reliably open a wav file and be able to freely access samples (it seems to me many libraries are optimized for playing the wav into audio buffer - no audio playback is needed here.

this would be done using processing

thanks for any suggestions

[skratchdot.com]

Java has built in support for most .wav/.aiff files using the javax.sound.* classes:

import javax.sound.sampled.AudioFormat;

import javax.sound.sampled.AudioInputStream;

import javax.sound.sampled.AudioSystem;

You can see how I read in sample data from a file here:

https://github.com/skratchdot/open-electribe-editor/blob/master/com.skratchdot.electribe.model.esx/src/com/skratchdot/electribe/model/esx/impl/SampleImpl.java#L757

Around line 801, I start to convert the stream to bytes, etc.

One thing the built in Java libraries don't have, is support for reading in special "chunks" of a .wav file.

I created a library called riff-wav-for-java that parses .wav files.  If you look at line 862 of that link I posted, you'll see how I grab loop points from files.  You could probably use that library to grab byte data, but I didn't really make a friendly API for that (kind of abandoned it since I only needed it for loop points).

Anyways, there's also the "Java Media Framework (JMF)", which is apparently the successor to the Java Sound libraries, but I don't have any experience with it.

You can also check Stack Overflow for what other people are doing.  I don't have a ton of experience messing with audio in Java (as I've only really used audio in Java for this project).  

Good luck!  Sounds like an interesting project you have planned.

[filip krzysztof tomaszewski aka zambari]

cheers, that's detailed help, exactly what I need, thank you