Hello! As future *alternative* to doing what you are trying to do with audio only (not any midi in this option), and say you did not want to go with an computer audio interface that has multi-track recording directly into your DAW such as Reaper; there's the Zoom R24 multi track recorder/sampler/and interface that records directly to up to 32 GB SDHC cards in wav format that can be brought into your DAW for integration/editing, etc. I have never used it as an DAW interface but supposedly it will do that at least with Cubase, but I have an
M-Audio Fast Track C600 audio/midi interface that I use for my DAW. However, the Zoom allows one to say record up to 8 tracks at a time or even say one track then play that track back WHILE recording your next track and so on. Even if you recorded 8 tracks at once, you could indeed then play all 8 and record next 8 while your first 8 are playing. I bought this because it also has excellent built-in condenser mics, can run on batteries, usb, or incl. power supply and it makes the option of taking it to say a stream and record nature sounds then use that "track" as a "sample" that I punch in and out wile recording something else in the ambient soundscapes I construct, and also bring any other tracks and fade in and out while laying down some pads. Then I can import that wav file as the individual tracks as you are wishing to do, and edit, etc., into my DAW Reaper.
Just thought I'd give you an audio only future option to look into at least...oh, and the inputs are combo xlr/1/4 with 6 inputs having mic pre's available. I am "old school" as well, recording mainly audio even into my DAW Reaper, as am wrapping my head around MIDI, but am not willing to part with a well armed arsenal of hardware synths collected over military career and now have all time in world to jam.
Peace!