<ditaa>
     /--------------\     18chn
     | Hardware  in +--+--------+---------------\
     \--------------/  |        |               |
                       |        |               v 18chn
                       |        |         +-----------+
                       |        |         | PC    DAW |
                       |        |         +-----+--=--+
                       |        |               | 6chn
                       |        |       /-------+
                       |        |       |       |
                       |        v       v       |
                       |      +-----------+     |
                       |      | Mixer     |     |
                       |      |    Router |     |
                       |      +-----+-----+     |
                       |            |           |
                       |            | 18chn     |
                       |            v           |
                       |      +-----------+     |
                       |      | Mixer     |     |
                       |      |    Matrix |     |
                       |      |           |     |
                       |      | 18x6 Gain |     |
                       |      |   stages  |     |
                       |      +-----+-----+     |
                       |            |           |
                       | 18chn      | 6chn      | 6chn
                       v            v           v
                     +----------------------------+
                     |           Router           |
                     +--------------+-------------+
                                    |
                                    | 6chn
                                    v
                     +----------------------------+
                     |      Master Gain Ctrl      |
                     +--------------+-------------+
                                    |
     /--------------\     6chn      |
     | Hardware out |<--------------/
     \--------------/

</ditaa>