# Managing plugin parameters in AudioPluginInstance

**URL:** <https://forum.juce.com/t/managing-plugin-parameters-in-audioplugininstance/30013>\
**Category:** Audio Plugins\
**Created:** [October 24, 2018, 2:22pm UTC](https://forum.juce.com/t/managing-plugin-parameters-in-audioplugininstance/30013 "2018-10-24T14:22:22Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![jacosol](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/jacosol/32/5080_2.png) [@jacosol](https://forum.juce.com/u/jacosol)\
**Post date:** [October 26, 2018, 1:29pm UTC](https://forum.juce.com/t/managing-plugin-parameters-in-audioplugininstance/30013/13 "2018-10-26T13:29:10Z")

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Thanks t0m for your help.  
Your answer clarifies a lot. So the interpretation of the floating point values (mapping them to a discrete set of choice) happens inside the processor of the VST and I cannot do anything about it (not even with the AudioProcessor I get with the AudioPluginInstance after loading), correct?

Then I guess there is nothing I can do other than “measure” when the change happens via the GUI. I thought maybe JUCE was taking care of this “mapping” so I could edit the mapping function but it’s not the case. It happens internally in the 3rd party VST processor (correct?).

I tested in logic for the values of the discrete parameter “osc2waveform” (5 values in the GUI) and indeed it changes at non-equally spaced intervals of the float value (see image below).

 ![image](https://us1.discourse-cdn.com/flex026/uploads/juce/original/2X/6/66533f45b3b6786a321699d8236139dfb70721a9.jpeg)

It looks like I’d better switch to a VST3 plug-in, which indeed provides a much richer rose of information when using `getText()` (see image below for the output of `getText()` after loading a VST3 plug-in in the `AudioPluginInstance`)  
 ![image](https://us1.discourse-cdn.com/flex026/uploads/juce/original/2X/2/292908ee6388ed47516d7130943371009cafec63.png)

I will check whether there is a VST3 version of the plugin available, I really like the Noisemaker synth!

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