If you share this document externally, please be sure to remove the 80 from the set of options. MMS will not handle M120e devices with more than 2 sources.
On Gen 2 M120e devices, the two SPDIF ports are configurable as inputs or outputs in a number of different ways.
The digital I/O options are configured using the "Digital input/output options" command (17). The third byte of the command is 00 for flexport A and 01 for flexport B. The fourth byte of the command is currently one of the following:
00: Digital Output Source 101: Digital Output Source 202: Digital Output Amp Zone 103: Digital Output Amp Zone 204: Digital Output Amp Zone 305: Digital Output Amp Zone 480: Digital InputFF: Digital I/O Disabled
Don’t configure both ports for the same option (both as digital source 1, for example).
Some examples, assuming our amp’s ID is 1234:
17FF12340000 sets flexport A to be digital mirror of source 1
17FF12340105 sets flexport A to be a digital mirror of zone 4
To fix erroneously configured devices back to what they should be at the factory, use:
17FF12340002 and 17FF12340103 to configure ports A and B to be digital mirrors of zones 1 and 2.
To determine an amp’s ID, see Determining an Amp's hex ID