VST index for parameters starts at 0 or 1?

Developer VST 3 SDK
1

Hi,
As the title implies I’m not sure if the the VST index for parameters starts at 0 or 1?
I work with JUCE to develop VSTi but everytime I export I get the first paramater of my plugin on the second parameter of the list in the automation track and not on the first one. So I wonder if it’s coming from JUCE, the way I index parameters for the host or from Cubase itself.

The list goes like this:
Undefined_0
Filter
Cutoff
…

Thanks in advance for your reply.

Damien

2

Did you ask the Juce support forum?

3

I’ll try to shift my VST index when I’ll update my plugins and will update this thread, it’s more about how the VST3 sdk is done more than a JUCE specificition.
Thanks and have a great weekend Yvan :wink:

4

In VST 2 parameters use index starting from 0 to identifying them. In VST 3 each parameter has a unique id (int32 value): Parameters and Automation - VST 3 Developer Portal (steinbergmedia.github.io)

5

Thanks Yvan, I’ll take a look at it, it’s probably because I indexed the wrong way, it was working for VST2 but for VST3 I have this difference. I should start at 0 not 1.
Thanks for your help!