But zynthian-ui doesn’t start up.
I opened two tickets:
Lots of things are failing in the build, not as simple as I saw. Its not likely to work because all those components are missing.
https://amp.tomshardware.co.uk/raspberry-pi-4-firmware-update-tested,news-61071.html Apparently Its getting warm
Yes, I can confirm that. I don’t have any cooling bodies attached yet either.
Hi @zynthianers!
I published a new post in the forum regarding the new RBPi-4:
Your feedback is welcomed! 
Regarding the new Buster SD-image, as you probably know, build script need to be modified to correctly work with Buster. I will start to work on it as soon as possible, but if some of you want to collaborate with the task, i would suggest following the instructions here:
that allow to run the setup script on a fresh Raspbian image.
You should try to run the setup script step by step and try to solve the errors. Most of them will be package-related, so easy to solve, hopefully.
My first RBPi4 will be here tomorrow, so i will be highly motivated very soon. I want to try Pianoteq with the new RBPi4 … ohhhh yessssss!!
Kind Regards!
Ahhh I forgot to say that tomorrow is the official launch of Debian Buster … happy new Debian!! 
A little bad news for us power freaks https://arstechnica.com/gadgets/2019/07/raspberry-pi-4-uses-incorrect-usb-c-design-wont-work-with-some-chargers/
Yep! Although not a huge issue, it’s annoying.
Anyway, perhaps it’s positive. I hope they will consider to implement voltage negotiation in the faulty USB-C design 
So maybe they will sell the faulty revision cheaper. My charger works…
I bought the official power brick with the board…
Almost there:
Some engines are not working yet and there are some other minor problems, but first impressions are really good. Pianoteq work without a glitch with any instrument/preset i’ve tested. No audible XRUNs.
Also some problematic presets, like ZynAddSubFX’s AngelPiano, that always produced XRUNs when playing a little bit hard. Now i can’t reach the limits. Wohaooo!! I’m super happy!!
Kind Regards,
The build from 07/07 is not enough?
I am camping right now and can’t add the zynthian - yes, I have one with me 
- to the internet.
What is the performance index of Pianoteq?
Are you using cooling parts on top of the IC?
OB-Xd is usually an easy one to get XRUNs with, and my favorite.
For pianoteq, did you test in 44khz?
On my Zynthian 3b+, I try the last release and have less xrun, test is made in 22khz
Should the Buster cut run on a Pi 3b+ ?
Is this he problem mentioned above?
You have to wait for a build younger than 07/11.
There is my GitHub issue where you can see the steps needed to get webconf running…but I would just wait.
All I’ve got now is three zynth’s that were working yesterday turned into rebooting idiots.
Large glasses of wine consumed. . . .
I’ve lost :
zynthian-nord (3B+ with audio injector)
zynthian-alm( 3B+ with audio injector)
zynthian-amp ( 2B with Hifiberry Amp)
Another large glass of wine consumed.
A Stretch upgrade to Buster, all of them.
I will try with OB-Xd ASAP
I tested Pianoteq with the same configuration that Aruk-RC3. Internally it works at 22KHz.
Regards,