Why Renoise lists audio generators (oscillators, noise sources, etc.) in the effect list?
The answer to this question is similar to the above (“Why Renoise uses the wrong in-/out- ports of my plugin?”): Renoise can’t list generators as instrument because it can’t detect what’s the use of the plugin input control ports. Guessing the correct control port for setting the frequency by it’s label isn’t a solution: due to the nature of LADSPA plugs a frequency input can be control data as well as audio data. Also Renoise can’t know which kind of control data the plugin expects: can be a signal that raise the freq by 3dB/octave, the MIDI note number or even pure frequency as a floating point number. This is a part of the problem with LADSPA generators: another one is that note-on and note-off events are unsupported (in better cases you can have a control handling them) because LADSPA never describes instruments (unlike VSTi or DSSI).
