Having read and gone through the steps many times over the last 10 years, I have never succeeded in creating a working linux studio PC.
AVLinux, no problem, UbuntuStudio, no problem. But, start from scratch and end up with a working studio, never.
I follow this page and that page until I've done so much I have no idea what's there and why it doesn't work, etc. At which point I give up and go find the install media for UBS or AVL. (And, I've been a UNIX/Linux developer and sys admin for nearly 50 years. Yes, I'm frustrated.)
This time I'm really trying to figure it out, it can't be that hard...
I can select the ZED, I start jack and I either get nothing or the system sound HW.
And, yes, I want to have sound from the browser available, for example. So, do I need pulse? I have no idea. I always see the pulse bridge in UBS. I read one website, it says trash it. Another says use jackd, another says use jackd2.
Sorry, definitely not anyone here's fault...just venting. I apologize.