Polyphonic Aftertouch in PT

@mooks but the development effort necessary to implement is not very much and there are some people having keyboards with PAT who could do great things with it. The midi bandwidth problem only exists when you use physical midi wires(I do and I am not having bandwidth trouble with the PAT feature yet. Besides my keyboard has an adjustable refreshrate for PAT data). When using a usb connection transmitting the midi data you definitively have the needed bandwidth.
But with one point you're obviously right, which is IMO the sad aspect of commercial products, that they have to serve the majorities only and things that few people want simply wont happen.
But maybe there is finally a change for PAT to become popular again as I have experienced my thinking about this feature really changed when I started to check it out: I don't want to loose it anymore!

P.S.: That low pass filtering thing on the synth side doesn't help to reduce the necessary midi bandwidth, but it is lets the PAT parameter move smoothly so that there is no crackle noise when tuning synth params with it. When you want to save bandwidth the controller has to do the low pass filtering, too.

The most obvious response one could implement is mapping of PAT to the pitch or the volume of a key. But theoretically one could change every parameter with the PAT data.

What I would really like is for PianoTeq to be able to run as an internal instrument in EigenD - the native environment of Eigenharps

PolyAT is currently available on the Infinite Response VAX77 and Rhodes Piano Mk 7 M series; Supposedly the Rhodes RPC-1 controller will implement PolyAT also. MIDI bandwidth is no longer a problem on relatively modern synths, but it isn't widely implemented in hardware. Waldorf, some Korg, Roland, Dave Smith Instruments do respond to it, as do many softsynths (OmniSphere, Alchemy, ImpOSCar2, Zebra2, DIVA, Logic ES2, etc.).

FWIW (probably not much), PolyAT is available on all the Eigenharp instruments via the MIDI agent. High-res (CC88) velocity is available as of EigenD V2

Pianoteq already covers a lot of historical piano's including two harpsichords and it imitates some electro acoustic keyboards like the rhodes, so I think the step to "keyboardteq" - as you called it - is already done in my opinion.

P.S.: I'm still looking forward to a statement of modartt regarding this topic

Sebion, we plan to release a clavichord instrument in the future -- work has not yet started but we have collected all the material we need to build the model. So it is quite likely that at some point, poly AT will be supported by pianoteq 4.

While adjusting the velocity response and well as the MIDI #88 High Resolution, I did notice in Pianoteq's MIDI monitor all of the polyaftertouch messages flying around from my VAX77; just a thought, but would it be useful (as in increase the efficiency of the Pianoteq instrument) to somehow have a setting to filter out all aftertouch messages from within Pianoteq? I don't want to do that from my keyboard or DAW as I use (poly)aftertouch frequently in other softsynths.

Doug- I did nothing to improve the action of my MIDIBoard, but Kurzweil changed the action available to one that was built by Hammond-Suzuki, and you need to find one of the later (late 1988-89) models with the improved action, like mine was. Also, if you are getting a "bounce," make sure the Retrigger Threshold Slider is set all the way to maximum (all the way up).

In the meantime, do check out the new VAX77 Ultra Heavy action!

Well, it is relative. Infinite Response has three keyweights available- Standard, which is extremely light; Heavy, which is light; and Ultra Heavy, which is perfect. My understanding is that Heavy was outselling Standard on an order of 10:1 until they came out with Ultra, which is rapidly gaining popularity especially with those more used to playing piano vs organ/synth. I originally had a Heavy action and thought it was still a bit light, I am now very happy with Ultra Heavy.

Their site says this: 'Also includes an optional multiscript that allows the use of polyphonic aftertouch for true "bebung" technique'

I have no idea what this means.