src/main/java/net/sourceforge/jaad/aac/sbr/FBT.java
public static int find_bands(int warp, int bands, int a0, int a1) {
		float div = (float) Math.log(2.0);
		if(warp!=0) div *= 1.3f;

		return (int) (bands*Math.log((float) a1/(float) a0)/div+0.5);
	}
public static int find_bands(int warp, int bands, int a0, int a1) {
		float div = (float) Math.log(2.0);
		if(warp!=0) div *= 1.3f;

		return (int) (bands*Math.log((float) a1/(float) a0)/div+0.5);
	}
/*
This function finds the number of bands using this formula:
bands * log(a1/a0)/log(2.0) + 0.5