Are you lowering the key or going higher? if you are going lower its a flat if its higher its a double sharp (##)
<h2><em>That note is an 8th note. It's called that because if you have a 4/4 note measure, it has 8 beats in total.</em></h2>
Answer: fabrics, cardboard, newspaper, old magazines, egg boxes, duct tape, thick paint strokes, are a few examples I use to add texture to a piece!