Now, I'll explain the different options you have. For sampling rate you can have either... 0: 8180Hz 1: 10910Hz 2: 16360Hz 3: 32730Hz The bigger the number, the higher the quality, but it also limits how long you can record. For the number of bits you have... 0: 8bit 1: 16bit 2: 8bit signed 3: 16bit signed You shouldn't worry about the signed ones for now.