I have a mackie 1604 vlz pro and frontier designs wavecenter which has 10ins/outs (8 lightpipe, and 2 SPDIF)
rather than putting the cable in partially, I plug an insert cable (Y) all the way into the channel insert.
I put the send cable into the input of the recorder and the return cable into the output of the recorder.
In the Wavecenter software, I can then either monitor all of the tracks being recorded through a single stereo output, or patch the inputs to the outputs and monitor through the original channel on the board.
Here is what I actually have set up on my 1604:
1: return wavecenter 1 (RNP A is sending to wavecenter 1)
2: return wavecenter 2 (RNP B is sending to wavecenter 2)
3: send/return wavecenter 3
4: send/return wavecenter 4
5: send/return wavecenter 5
6: send/return wavecenter 6
7: send/return wavecenter 7
8: send/return wavecenter 8
9: roland xv-3080 line-in left (via patchbay)
10: roland xv-3080 line-in right (via patchbay)
11: ensoniq asr-x pro line-in left (via patchbay)
12: ensoniq asr-x pro line-in right (via patchbay)
13: unassigned
14: unassigned
15: unassigned
16: unassigned
aux 3 wavecenter SPDIF for playback monitor left
aux 4 wavecenter SPDIF for playback monitor right
most of what i do is just mono or stereo recording through the RNP, so the line-ins for channels 9-16 are the normal for my patchbay. when i'm ready to record the 3080 or asr-x, I patch them to the RNP.
however, i have channels 3-8 on the mackie ready to record onto the other 6 available D/A/D channels when called upon. All i have to do is connect the instrument/mic and press record on the appropriate track.
I have no outboard FX or dynamic processors, so the returns for aux3|4 are used to monitor previously recorded tracks in those situations where all 8 lightpipe channels are busy.