SCARLETT2_CONFIG_INPUT_GAIN
mixer, SCARLETT2_CONFIG_INPUT_GAIN,
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_INPUT_GAIN,
[SCARLETT2_CONFIG_INPUT_GAIN] = {
[SCARLETT2_CONFIG_INPUT_GAIN] = {
[SCARLETT2_CONFIG_INPUT_GAIN] = {