As far as I'm aware there are only two choices to interface your DAW to your modular synth: MOTU's Volta and Expert Sleeper's Silent Way. My current problem with both of these options is that they require an audio interface with DC coupled outs. The list of these interfaces are limited as can be seen here: Here
If I were going to get in the game at this point I'd be limited to only my headphone outputs as a means of communication between modular and computer which... is rather limited. Thankfully Expert Sleepers found a way to make any interface with balanced outputs have access to this modular computer communication. Originally they suggested you make cables yourself that encoded AC cables with DC properties while they provided the software to integrate it with the rest of Silent Way. But it seems like someone on their team took the initiative to make a breakout box so you could bypass making your own cables.
Now it seems that someone just needs to build so I can buy them because I'm sure as hell too retarded to put this together myself.
- Silent Way Software Encoder Information
- Expert Sleepers Silent Way
- Motu Volta