It's also very easy to overload the midi bandwidth with polyphonic aftertouch data, which is likely why it wasn't used in more early synths. The CS80 used it in

It's also very easy to overload the midi bandwidth with polyphonic aftertouch data, which is likely why it wasn't used in more early synths. The CS80 used it internally since it didn't have midi and could only be routed internally. > Keyboards capable of generating polyphonic aftertouch are relatively rare, since it requires a more expensive mechanism than what is needed for channel aftertouch. Polyphonic aftertouch is also known as a generator of large amounts of MIDI data, which in older equipment was capable of exceeding the maximum bandwidth of a standard MIDI cable (the so-called MIDI choke), https://electronicmusic.fandom.com/wiki/Polyphonic_aftertouch https://electronicmusic.fandom.com/wiki/Polyphonic_aftertouc...