This is what my Overheads, Room and Ambience mics routing looks like in BFD. Even though AmbMix is routed to Master, I’m not actually routing Master into DP. Only BFDs stereo 2 and 3 and mono 1-16. Note: I like a mono room mic, so, I route it to Mono 1, but, if you like stereo, you could route it to Stereo 4 instead.
(My obsessive nature would probably have me have room on Stereo 3 and PZMs on Stereo 4)
I’m not certain that BFD actually uses PZMs for their ambience mics. The photo sure isn’t a PZM. Ambience has always meant PZMs to me, so, that might just be in my notes to myself.
While I have this set up this way, most of the time, I like to only use overheads, room, hat, Snare 1 Top, Kick 1 Out. That’s generally how I record a drum kit.
Oh and you don’t have to set it up the way I do. You can put any mono source on any mono channel and any stereo source on any stereo channel. The important part is how it corresponds to DP (or your other DAWs which is probably different for each DAW).
It looks like you changed the names of them, but, left them all in the AmbMix routing.
I don’t know what the Comp 1 and Comp 2 mics are, but, your Mono 1 appears to be the OH (Overhead), Mono 2 appears to be Room and Mono 3 appears to be Amb3. At the bottom is where you change the routing. Where it says AmbMix.
I just pulled up each of the Back To The Seventies and they’re all zeroed out. I don’t do any mixing or routing within BFD, so, I don’t know if the mix section just stays as is regardless of Preset. Mine stays the same regardless of preset. I also don’t really use the standalone app, so, this appears to be the default for the mix section
I’m seeing what you’re seeing now on 70s Rock 1 110bpm. You wouldn’t necessarily need to use all of eight AmbMix mics that they are using. You could route all of them if you wanted to, but, you might just want to route the OH, Room and Amb3 mics.
Or, you could potentially route OH to Stereo 2, Mono 1 to Mono 1, Mono 2 to Mono 2, Comp 1 to Mono 3, Comp 2 to Mono 4, Room to Stereo 3, Amb3 to Stereo 4, but, you would have to reroute every time you pick a new preset. All of those extra mics aren’t really necessary.
If you did want to use them, you might leave everything but OH, Room and Amb3 routed to AmbMix and then route AmbMix to Stereo 5.