Lot’s of musicians, my band Nightshift included, use Logic for live use on stage. There are many different ways it can be incorporated into a live setup.
Here’s one typical scenario: you are on stage playing live. You have Logic setup so as to be able to play and use a variety of sequences, loops, soft synths, throughout the show - all going through various internal routings and Plug Ins.
No prob – you do your basic internal processing and relative level matching within Logic and then feed the main output of your audio interface to the mixing board (or sound man) to incorporate into the main mix for the house PA system. EQ on the mixing board is used to help it fit into the mix. Sends on the mixing board easily take care of routing your signal to various on stage monitor mixes.
But, this is a big gig and it is being recorded for posterity. All signals are reaching the mixing board, but also need to get routed to a separate multi track recorder for independent multi tracking – to be mixed later in a studio. Here’s an easy way in Logic to split your carefully sculpted sounds and internal setup for multiple routings.
Instead of having the entire audio stream routed directly to Output 1-2 of your audio interface; route it to an unused Bus instead. This bus will act as a Master Bus. Then create two Aux Objects. Set the input of each of these Aux Objects to the Bus you are using as your Master Bus. Set the output of the first Aux to Output 1-2. Then set the output of the second Aux to an alternate pair of outputs on your audio interface; say Output 3-4 for example. You now have a duplicate of your main signal available at two separate pairs of stereo outputs. Now send Output 3-4 to the multi track recorder.
By doing this you will effectively be sending a duplicate of your internal mix to the house PA system and to the multi track recorder. Your mix can be processed for the house PA system with no worries of it affecting the pristine settings you want captured on the multi track recorder, where it can be processed in greater detail in a proper mix studio.
You even have the added advantage of having separate gain/attenuation control for signal going to the multi track recorder – which could be very useful – depending on what level of input control is available on the multi track recording device.
This is just one of the many advantages of routing your main audio stream to two (or more) output pairs on your audio interface.