Error saving/loading zynaddsubfx state (VST)

[akimaze]

Maybe this is another manifestation of VST3 loading bug but this time in VST2 plugin. This time I found that saving project with ZynAddSubFX (preset Soft Vibes) sounds different after loading. This can be related to #1359 and VST3 problem #1350. The bad news is that sometimes project is loaded correctly (about 10% chance to load correct). I also tested zyn in other DAWs and they load zynAddSubFX state correct all the time.

I use zynaddsubfx from kxstudio.

1. Steps to reproduce the problem.

• Step 1: Start Radium.
• Step 2: Add ZynaddSubFx
• Step 3: Change preset to Soft Vibes, add some notes
• Step 4: Save project
• Step 5: Open Project
• Step 6: Track sound different

I found that Full Oscillator looks different (it looks different each time it is loaded):

Should be:

• I've tried this recipe about 10 times.

• The unexpected behavior has happened about 9/10 times.

2. Which version of Radium are you using? Do you know if an earlier version has worked?

To be sure that it was not the quick fix for VST 3. I tested with the official version 6.9.97.

3. If relevant, which operating system did you run Radium on?

Linux Mint 20.3

[akimaze]

@kmatheussen I made more tests and I reproduced this issue also in Waveform, but in Waveform you need load project about 30 times to get wrong plugin state. After that I compiled zynaddsubfx myself (current master 3.0.6) and the problem disappeared. So that was a zynaddsubfx bug and is fixed in git.