Hi there,
regarding your actual question, with the Avantis you’d configure tie lines from the inputs you want to track to the local outputs and then use XLR cables from the local outputs to your Tascam.
Having said that, I saw that this is your second thread regarding that topic, so I’ll say the only thing that will *really* help you: Get in touch with the local tech working on that show. While I think it’s a good effort to try to make it “as easy as possible” for the local crew, you’re actually doing the opposite by trying to come with your own solution without proper understanding of the system that will be in place that day.
The least work possible for any tech is if you approach them in advance (before show day!), let them know what your plan is and don’t try to come up with a technical solution that might interfere with anything they have set up. The worst case is someone reaching out only on show day asking for a multitrack recording.
Be prepared that it might very well be that they’re declining your request for a multitrack, because it does add extra workload (and you can’t help with that) and additionally, it’s not a given that the technical circumstances allow a separate multitrack recording.
Not trying to come off rude, just trying to help. 🙂
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