If i have a function (void) X that takes an array of object in as a parameter and subsequently modifies said objects in the array, what will be the end ...

This post shows readers how to create an array in Java. Including: Array Lists, multidimensional arrays, maps, and more.

I haven't worked much with raw audio, but if you want to wrap a byte arrays and treat it as an array of floats, there are utilities in ByteBuffer (java.nio) to do that efficiently.

Tap the "Pass Data" button to pass an array from Java to C/C++, perform a calculation on it in the native layer, and return the modified data back to Java. The modified data is displayed on the screen ...