Hello! It's definitely included into 1.3.0-alpha 64-bit Appimage and the source code have this:
Thanks for answer! Assumed not all the "built-in" effects is cross-platform.https://github.com/swh/ladspa/blob/0c94d096a2202c83dcb89b5b66bd6047cb0e98c7/ringmod_1188.xml#L43 wrote:<port label="modulator" dir="input" type="audio" hint="default_0">