Tubbutec TRS Bridge 4x4 TRS MIDI Router + Merger (Silver)

Each of the MIDI inputs can be connected to one or more of the MIDI outputs. Similarly each of the MIDI outputs can receive MIDI data from one or multiple inputs. TRS Bridge can set these routes in a simple modes for all types of MIDI messages, but it is also possible to route different kinds of messages differently:

Note and Controller data are all the midi messages that can be merged without any issues. If two devices send midi at the same time, data will be interleaved and sent to the receiving device.Clock data can not be merged, only one midi clock stream can be used at a time. When changing the routing, TRS Bridge makes sure that each output only receives clock from a single input.

Sysex data is even trickier to handle than clock data, because sysex messages can have an arbitrary length. if multiple sysex streams are received simultaneously, USB bridge A buffers the data and will forward it to the receiver as soon as possible. This way sysex messages are merged as well.