iOS鼓音序器 - 缓冲区问题（访问不良）

I am making an 8 step drum sequencer using objective C. I am loading kick, snare, and hat samples into a buffer however, when the simulator runs and a switch is pressed to toggle a kick drum, I get a dreaded EXC_BAD_ACCESS error and the program quits.I am making an 8 step drum sequencer using obje