Duplicate Logic Stereo Sum to additional Output 3-4??

Hi all,

Does anyone know of an easy way to take anything and everything that's going out of the stereo master bus in Logic, and sort of split it so that it goes to Outputs1+2, AND Outputs3+4, simultaneously?

I've been doing extensive work with Blackhole for routing to OBS, Zoom, and a dozen other places, and it's awesome. But I have to use a template that is a really elaborate and somewhat klugey mixer, having all channels sent to a bus instead of stereo out, then that bus bussed to another bus, so I can have Outputs 1-2 go through the Blackhole to any software input, while Outputs 3+4 from Logic actually send to my interface's Outputs 1+2.

It sounds confusing, but think of it as having everything shifted up by 2 channels.

This is a pain in the ass and it would be great if I could somehow just push a magic button and have a "Second Stereo Sum", which would go to my monitors while the first one goes to OBS streaming, or a Zoom lesson, or wherever.

Thanks

Try this:

1. Go in audio prefs.
   
2. Select the Output tab within the I/O Assignments one.
   
3. Select the other desired output pair (3&4 in your case) among the available ones (depending on your soundcard/AMS setup).
   
4. Enable Mirroring to mirror the stereo output (default 1&2) to the selected output (3&4).

Your mixer will now mult to both stereo (1&2 and 3&4).

I use Atlas’s mirror checkbox as well

Simple - easy and applies globally to all tracks

Put an IO-plugin after the last plugin of your Stereo Out. Set it to 'Out 3-4' and its Dry/Wet control to 0%. Done. You can disable that by bypassing the plugin.

This is so insanely simple and effective that I never would have thought of it. Genius.

Only thing... I'm just gonna assume that with the Stereo Sum fader at 0, and nothing near peak level in the mix, the output on the channel strip reading +6.4dB just comes with the territory for this use case?

I use Atlas’s mirror checkbox as well

Simple - easy and applies globally to all tracks

This is a good solution in theory, however it does not work for me:

I must set the "Blackhole" routing software as my I/O device, and it is only stereo.

[with the Stereo Sum fader at 0, and nothing near peak level in the mix, the output on the channel strip reading +6.4dB just comes with the territory for this use case?

Absolutely not. Is the Master Fader at unity ?

[with the Stereo Sum fader at 0, and nothing near peak level in the mix, the output on the channel strip reading +6.4dB just comes with the territory for this use case?

Absolutely not. Is the Master Fader at unity ?

Yes. And this might just be an oddball scenario then, because I'm not doing a "normal project" at the moment. I'm taking a very dense mix, stereo file, and doing all sorts of weird time stretching and pitch stuff with it. So I'm sure some artifact transient or something just snapped it up that high. I'm paused my stream/recording and right now the master is at -1.6, so it was probably just an anomoly.

But really, thanks so much for such an easy solution to the Blackhole routing. The setup I was using before was actually a team effort between me and the creator of the software! I should probably let him know about this. I'll credit you.

In either scenario, I don't HAVE a 3-4 Output 

5 hours ago, Wizardofvoz said:

In either scenario, I don't HAVE a 3-4 Output 

Does your audio interface actually have one, and tell macOS it has Outputs 3&4?