I love singing, but I'm finding my voice is too clear and pure sounding for the metal I'm wanting to sing. How can I achieve a raspiness to my voice either temporarily or through training. I tried downloading the Melissa Cross DVDs and CD to train your voice for what she calls Heat (screaming with a tone) but I'm finding it difficult to grasp her training methods. Best example for the type of sound I'm wanting to achieve is the not so screamy stuff by In This Moment (ex. Forever).