dumb question, in the web configurator hardware kit "advanced mode"there is a V4 option but if you select it and hit “save” it gives you a 500 internal server error and the unit remains set to V3 Pro. Everything on the V4 seems to work in V3 Pro mode. So is the V4 mode a future thing or am I doing something wrong?
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confirmed, I have the same issue.
While we’re testing:
When I’m running update (rc2, v4 kit) I’m getting the following error:
/zynthian/zynthian-sys/scripts/epdf_detect.sh: line 7: [: too many arguments
This script needs some quotes as the spaces in the following file are causing problems:
cat /proc/device-tree/hat/product
DAC+ ADC Pro
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My fault. I broke things while implementing the headphones output 
It should be fixed now. Update software and test …
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Aha! Works now! Thanks!
My v4 kit received and partially tested, working well…
v4 kit with RPi 4 is a great music box !
Thanks so much
Regards
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Promised is debt …
I just implemented per-channel volume and gain controls on the Zynthian UI’s ALSA Mixer.
Update & Enjoy!
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I just got it via DHL yesterday. So was 12 days from buying to receiving it in the US. Awesome! Starting to build it now.
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Hi all,
I just decided to place an order, but the kits are all gone :-(.
Any idea, when kits are on stock again?
Thanks,
Joepi
We hope to have more kits in a few days … stay tuned!!
Regards!
Kit v4 is available again, but RCA output connectors and mini-jack input connector have gone and will never come back. Long live to 1/4 inch (6.25mm) Jack connectors!
Enjoy!
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Thanks,
just placed the order …
Jörg
Hi @jofemodo,
Does this mean that the hifiberry team has built a customised version of the hat for the zynthian kit ?
Are the footprints and internal wiring of the RCA connectors still alvailable on the hat?
[Edit] I’m so happy that Zynthian V4 Can be out if stock: it demonstrates its succes 
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They are working on it, but it will take a few weeks yet. Current kits include the Hifiberry DAC+ADC PRO modified by hand. We removed the connectors. The foot print is still there … but pin-holes are not usable.
Regards,
Wow ! Fastidious job.
Can you please elaborate: there will be no way anymore to add RCA connectors on the hifiberry hat ?
Thank you for all of this: kind responses, awesome software/hardware
Desoldering is a risky sport, so we preferred to cut de connector pins. Safe, clean and fast. Of course, you could try to remove the pins from the holes, but if you need the RCAs, then you should buy the hifiberry on HB’s shop.
Anyway, Zynthian aluminum case has no RCA connector holes never more, what is better, it’s soundcard-agnostic, given than you remove the connectors from your soundcard, if any.
Regards
Okay thank you for clarification.
All the best.
Somehow I’m happy to have gotten a V4 kit of the first batch with the RCA still in place. I can think of it as something special now 
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It’s, in fact, a quite limited edition … 80 units!
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