If you press small "+" button in the left-bottom corner of the virtual keybord, it will be extented to 105 keys. Press again to return to 88 keys.

No need to extent it more because of ear limitation below 20 Hz and loss of musicality in too high notes.

P. S. I have another question about modelling: if I enable 105 keys, does extra keys will involved in sympathetic resonance? It's just for interest, because I hear no difference even when maximize "sympathetic resonance" slider.

Ross,

I understand your question but of what use is SR when used with the limited number of scores, e.g. Busoni?

How could you utilise it or should I say identify it whilst listening to the extended bass notes of say a 105 note Bosendorfer Imperial Grand?

Ian

No need to extent it more because of ear limitation below 20 Hz and loss of musicality in too high notes.

P. S. I have another question about modelling: if I enable 105 keys, does extra keys will involved in sympathetic resonance? It's just for interest, because I hear no difference even when maximize "sympathetic resonance" slider.

It's not a life and death question, but since you allow users to go beyond the realistic piano model limitations in many ways why the 88 keys diapason is locked? Why the notes are just muted, can you unlock them please?