you can't route back to Master anymore, all routing must always go forward: inputs -> tracks -> outputs... although you can aux-send from some output bus to another iif the later is listed _after_ the former, which is never the case of the first bus, usually Master Out as said.
but why do you want that? each audio output bus presents their out jack ports that you ought to connect somewhere (but take special note it is not advisable to first target any of the qtractor own inputs in that way).
you can't route back to Master anymore, all routing must always go forward: inputs -> tracks -> outputs... although you can aux-send from some output bus to another iif the later is listed _after_ the former, which is never the case of the first bus, usually Master Out as said.
but why do you want that? each audio output bus presents their out jack ports that you ought to connect somewhere (but take special note it is not advisable to first target any of the qtractor own inputs in that way).
cheers