public void setHighFreqVolume(float highFreqVolume) {
        if (highFreqVolume < 0 || highFreqVolume > 1)
            throw new IllegalArgumentException("High freq volume must be between 0 and 1");

        this.highFreqVolume = highFreqVolume;
        this.updateNeeded = true;
    }
Sets the gain at high frequencies for the Band-Pass filter.

@param highFreqVolume The high-frequency gain value (0.0 to 1.0).
jme3-core/src/main/java/com/jme3/audio/BandPassFilter.java