Good day all

I've recently learned how to make a crossfader by following this tutorial:

I am wondering if there's a way to make it so that if I'm using 2 soundcards I can have a monitor mix and a main mix but fade between them.
So I've [dac~ 1 2 3 4] with channels 1+2 being my main output from my external soundcard to speakers, and 3+4 as a monitor mix from my internal soundcard going into headphones.

Is there a way that when I slide the crossfader it can change what's being heard out of each soundcard?

Pretty much a dj mixer, I want to hear track 1 being played through outputs 1+2 through speakers and track 2 through 3+4 into headphones when the fader is all the way to the left, and vise versa with track 1 through headphones on channels 3+4 and track 2 through main speakers when it's all the way to the right, and so that both tracks come out of both outputs when the fader in set to the middle?

I've no idea how to do this and I've searched everywhere. I'd really like to be able to play my next live set in PD, but this is a pretty crucial part of it.

Many thanking yous

OK I think I figured it out. If anyone at all is interested in this then here's a pic

after your sliders, throw in this:

[pack 0 20]
|
[line~]

and then attach that to the [*~] objects as before.

that'll give you smoother, click-free fades

Awesome

Thank you, is that after all of the sliders?