n_analog_out 137 sound/usb/6fire/control.c struct control_runtime *rt, int n_analog_out, n_analog_out 146 sound/usb/6fire/control.c (1 << (n_analog_out / 2)) - 1, n_analog_out 32 sound/usb/6fire/control.h int (*set_channels)(struct control_runtime *rt, int n_analog_out,