I have this piece of code for a video game which updates the gain for a music loop based on how far away the player is from the end door

    public void updateMusic()
    {
        int endX = currentMap.getEndPointX() * TILE_WIDTH;
        int endY = currentMap.getEndPointY() * TILE_HEIGHT;
        
        double dist = Math.hypot(endX - playerX, endY - playerY);
        
        if(dist < 300)
        {
            double gain = 600 / dist;
            
            FloatControl gainControl = (FloatControl) raveLoop.getControl(FloatControl.Type.MASTER_GAIN);
            gainControl.setValue(Math.min(0, Math.max(gainControl.getMinimum(), (float) (-10 + gain))));
        }
        else
        {
            FloatControl gainControl = (FloatControl) raveLoop.getControl(FloatControl.Type.MASTER_GAIN);
            gainControl.setValue(-20f);
        }
        
        
    

The gain of the audio is updated, but very choppily. I have a loop that updates it 20 times a second but instead of updating continuously it will suddenly jump/drop in gain randomly. Is there a way to force the audio system to update? Or is this the wrong way to do dynamic audio like this?