CONFIG_VARIABLE (bool, send_mtc, "send-mtc", false)
CONFIG_VARIABLE (bool, send_mmc, "send-mmc", true)
CONFIG_VARIABLE (bool, mmc_control, "mmc-control", true)
-CONFIG_VARIABLE (bool, midi_clock_control, "midi-clock-control", false)
CONFIG_VARIABLE (bool, midi_feedback, "midi-feedback", false)
CONFIG_VARIABLE (uint8_t, mmc_receive_device_id, "mmc-receive-device-id", 0)
CONFIG_VARIABLE (uint8_t, mmc_send_device_id, "mmc-send-device-id", 0)