I see Firefly MC has a smart card. How is a smart card used?
Beginning with Firefly version 3.1, the smart card is used in two ways. First, for Configuration backup, Firefly MC settings can be saved to the smart card OR the settings can be loaded from the Smart Card to the Firefly MC. This is very handy for field service calls or installations when multiple Firefly players are used. Second, the smart card is used to enable Firefly MC options, a) Dolby Digital Decode audio, b) Enable multicast client software (Kencast or Skystream) c) External A/V Switch. d) For Firefly V3.20.4 or higher the Smart Card enables channels 3 and 4. Making a Firefly MC 2 channel into a Firefly MC 4 channel player requires this smart card option.