6.19 VST and VST3 FX Compatibility Settings
Various compatibility settings are available for VST FX plug-ins.
Kind: concept (user-guide-section) Chapter: 6 Managing Track and Item FX Source: REAPER User Guide v7.70
Various compatibility settings are available for VST FX plug-ins. These are available by clicking on the + button in the plug-in’s window (immediately left of the Param) button and choosing Compatibility settings at the foot of the menu that is displayed. For example, you can Save minimal undo states if you wish, and/or Avoid loading undo states where possible. Other options include Inform plug-in when track channel count changes, Hard reset on playback, Save state as VST bank and Buggy plug-in compatibility mode.
The Automation notification options let you over ride various VST preferences settings for specific plug-ins. For VST3 plug-ins, if using sidechaining you may need to Request VST3 bus channel count to inform the plugin how to interpret the channels REAPER is sending This is because REAPER does not have dedicated sidechain buses. This command is available on the plug-in’s right-click In/Out menu, next to the Param button.