If we’re sharing wishlists, I would wish for a version with a multi-channel codec - even if just on output, six channels would be amazing for stuff like sending different synths out of different outputs for further processing in outboard gear, or doing a channel or two of DSP internally for other gear.
When will you be shutting up and taking my money?
Hi @jtode
as is, it’s unfortunately not doable with some kind of I2S Hat.
Due to the limitations of the RaspberryPi SOC.
There’s a huge thread on RBPi Forum called STICKY: The I2S sound thread. [I2S works] (+1000 posts), where some hackers have tried to explore multichannel audio without really luck except for the audioInjector Octo (based on the Cirrus Logic CS42488 codec which is capable of 6 ins + 8 outs).
But the creator of the Octo sound card has had to write the driver and so far I understand it’s a dirty hack.
To resume: I2S works only in a single stereo channel (1 in + 1 out)
USB multichannel sound card should be supported but I can’t really confirm, as I don’t own this kind of gear.
Maybe some others fellows here can confirm ? @riban , @wyleu
For sure more inputs will be JOTT
How about adding a 2,54 header (maybe unpopulated) for accessing any possibly unused RPi GPIOs? Or are there none left? It looks like there is also plenty of space for much more optional extensions of the board…
Well, would be nice to deploy some more powerful hardware, but I understand the reasons against such experiments…
Multichannel and DSP are also nice ideas (not necessarily for everyone, however).
Multichannel audio is supported via USB. I have used a Behringer UMC1820 to add more audio inputs and outputs. It works well and is great with the Zynthian mixer.
I also have a Cirrus Logic Audio card here, which purports to support six channels. I never got it working back in the day, but I did a bit of googling just now and apparently it’s much easier to get it working now. Decent specs too.
Long dead.
Wow this is exactly what I expected a future zynthian kit to be. No doubt you hitting a massive milestone!
Hats off for the awesome work achieved by the zynthian team
There is an amazing history behind this main board. In the next days i will tell you the tale of how a mysterious benefactor and open source lover financed this development and more.
Stay tuned!
this is very exciting. great supporter for a great project 
it looks like this carrier board will be able to serve as a base for any audio/midi diy project relying on RPi4.
I would like to say that the new Z2 main board is working flawlessly:
Note the 5 inch DSI display and the all-to-the-right controller’s layout 
Regards,
Well now.
Since as you know, I’m actively building a controller and am adopting v5’s conventions, is there anything else I need to know about where to place my physical controllers?
Also, is there a projected date for availability? Will there be pre-funding? How can I send you money sooner lol
I would put the controllers in the right side, although current layout will be supported too, of course!
We prefer to not pre-fund at all. It’s a popular but dangerous practice (see this, for instance) and we prefer to work without this kind of pressure. Too much pressure is not good for any project. We go slowly because we go faraway!!
Regarding timing, our goal is May-June, what it’s quite adjusted, indeed! 
All the best
I actually respect that a lot. I’m positive it’ll be worth the wait. :>
Does this mean there’s a new screen layout?
This is very cool. I really love this 5inch display.
z2 Main v0.7 board looks very nice too
On the subject of screen layout, I assume that’s what the Kit section of the webconf is about, but is there a guide to the differences between the many options? Being as I have physical knobs I wanna turn off the dummies but not exactly sure what to change to. Staying with v4 layout cause that’s where they are on the prototype panel.
