Expansion cards primarily function to provide your digital mixer with a ton of new connection options all at once, via D-sub cables, MADI or Ethernet, for instance. Not only do they help you save on cabling, but in most cases the signal no longer needs to be converted to analogue for editing and signal distribution. There are also expansion cards for digital mixers that send analogue signals via a special interface. Remember to check our expansion cards for keyboard instruments too!
