@ Tone13

Have you enabled Buses C to G is vMix Audio Output Settings?
Once enabled, all those "extra" busses will be available as a source for vMix Callers.
https://www.vmix.com/help23/AudioOutputs.html



Ice

Try the following (I believe this will do what you want)

Use a bus for example bus A as your program mix instead of the main M bus. So reconfigure records, outputs etc, accordingly.
Keep return routing to any mix callers from the M bus.
This way you can route your PGM on bus A to the callers (on bus M) and add any additional sources (Producer mic for example) to the main mix (bus M) without it going out to PGM (still on bus A).

Inputs -> bus A
bus A -> Records
bus A -> Stream
bus A -> outputs
bus A -> Bus M
Bus M -> Vmix call return
Producer mic -> Bus M

Hope that makes some form of sense.