Bidule is a 3rd party host developed by Plogue and can be found here: [2]. This tool supports unequal numbers for input and output channels and can retrieve the configured number of channels automatically. Using the VST3 plugin without a sent signal flow, the plugin will startup with 2 input and 2 output channels. Once you have sent the signal flow and re-added into the patcher of the tool, the number of inputs/outputs will be updated correctly.
