Automation Breaks with Dynamic Parameter Tree AUv3

It seems Cubasis doesn’t properly support dynamic parameter trees. I am a developer of Mela and lately, I’ve been getting a few emails from Cubasis users telling me the automation doesn’t work with Cubasis. Mela regenerates its parameter tree based on a preset and if user modifies it by adding/removing modules the parameter tree updates accordingly.

Running Mela 6.0 with Cubasis 3.7 on iPadOS 18.2. Steps to reproduce the issue:

Mela on the App Store: ‎Mela 6 – AUv3: Synth, FX, MIDI on the App Store

  1. Create a track with Mela 6.0 as an instrument AUv3.
  2. Enable looping.
  3. Enable R and W and touch various parameters in Mela.
  4. Automation will be recorded and played back.
  5. Reload the Default preset in Mela and try the same again.

Actual Result: Old automation is lost and the new automation is not captured.
Expected Result: Old automation should have continued working and new automation should have been recorded.

Here’s a video demo: https://youtu.be/M3w9g_HKkuk

I’ve also written a tech note on the topic for AUv3 host developers, I’m sure your developers know all this, but just in case here it is: AUv3 Dynamic Parameter Tree | Nikolozi — Artist & Engineer

I’m happy to help with the debugging process. Let me know if anything is not clear in the bug description.

(Is there any reason why I can’t include links in a post?)

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Mod, please grant me the right to include links in posts; otherwise, let me know how I can get in touch with Cubasis engineering regarding the issue directly. Cheers!

You could try sending a PM to @LSlowak

Sometimes it does help to manually add links using the toolbar functions instead of directly pasting in a link.

My toolbar doesn’t have ability to insert links. Most likely because I’m a new user.

Update: And looks like DMing is disabled for me. Probably to prevent spam.

Gonna second this as I reported this issue to Mela. Not sure what the under the hood is like but Mela is a wonderful modular synthesizer that loses a lot of potential when it can’t be automated.

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Hi @Nikolozi

Thanks for your message, which will be shared with our engineering.

Best,
Lars

@LSlowak , Thanks for the response.
Can you grant me the ability to share links in my posts?
So, I can provide links that were supposed to be in the original post.

Update: thanks for the permissions! I’ve added the links to the original post.

Hi @Nikolozi

The request has been added to our backlog.

Best,
Lars

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@LSlowak, That’s great to hear, thank you!