Multiplexing
locast2tuner normally starts an HTTP instance for each Tuner, starting at port (default 6077). But with the option multiplex, it will start a single HTTP interface multiplexing all Tuners through one interface for both streaming and EPG.
For example: if you use --multiplex --override_zipcodes=90210,55111, all channels from both ZIP codes will be available, but multiplexed at http://localhost:6077.
This type of multiplexing makes sense in Emby, since you can add a single tuner at
http://PORT:IPorhttp://PORT:IP/tuner.m3uand a single EPG athttp://PORT:IP/epg.xml