MIDI Out FX are created for each MIDI output port installed on your system. This typically includes USB MIDI keyboards, MIDI interfaces, and software MIDI ports such as MidiYoke. To see the list of MIDI devices installed, click on Tracks->Add MIDI Track and look at the second section.
Left click on a MIDI output FX to open the MIDI Output inspector. At the very top is the name of the physical MIDI port for this FX. Below that are settings for the channel, sync and studio.
There are two channel settings: The MIDI channel (1-16) to use for this port, and a filter control to determine which types of MIDI events are allowed through.
Sync settings are used to slave external apps to Temper over MIDI ports. There are a variety of different sync protocols, so you might need to consult the documentation for your slave application to see what's appropriate.
The two basic aspects of sync are Transport and Clock. Each sync protocol will support one or both of these, described below. If the protocol supports Transport sync, then the slave application will be informed when Temper starts and stops, and the current song location when start begins. If the protocol supports Clock, then the slave application will receive constant messages informing it of the current location in the song, so that it can maintain a lock.
Temper current supports the following sync protocols:
Tutorials on sync'ing other applications to Temper:
Studio settings are a way to provide information about the device this MIDI port and channel represents. For example, if this is a port to a MIDI hardware device, the studio can be used to provide an icon that represents the device as well as patch and controller names appropriate for the hardware. If Synchronize all channels is selected, then any changes made in the studio will be used for all other MIDI output FX on this port, regardless of channels. If you have one MIDI port that has different channels going to different hardware, uncheck this box, otherwise leave it on.
The Device button lets you select from any of the installed devices, and the Label field lets you give a friendly name to the FX.