If the host honors the "CLAP_PARAM_IS_READONLY" flag, Apricot will not be able to automate filter mode, which in my opinion, is a shame. If the host ignores "CLAP_PARAM_IS_READONLY", the host can at least automate the filter mode from the interface. The synth would be better if it told the truth and let the host automate those values. Changing the filter mode (and other parameters now marked read only) sounds really cool.