Hmm, OK, how do I address 16 different notes on the different MIDI channels?

Firstly, you require a software like MidiPipe or a MIDI device such as a keyboard which allows keyboard splits to MIDI channels that are independent of each other.  Understandably, some education is also a requirement; if you use the Gig Performer software in lieu of a freebie, it has some documentation as a bonus.

Can you tell me how to pitch bend just one note and leave all the rest alone in one instance of Pianoteq?

I've tried out Amen's suggestion and it does work. Steps are:

1. In Pianoteq MIDI options make sure that Notes channel and Pitch Bend channel are both set to "Any".

2. Send the note you want to bend to channel 2, send all other notes to channel 1.

3. Send the pitch bend data to channel 2.

This will bend just the note you want to bend. At least, it does that on Pro here, I guess Standard would behave the same?.

Of course, this now leaves the question of how to actually achieve steps 2 and 3. But that question is external to Pianoteq and depends on the rest of your setup e.g. on what OS you are using; on whether you are running Pianoteq stand-alone or as a plug-in (and if so, what software it is plugged into); on where the MIDI data is coming from (A keyboard? A sequencer?).

It was suggested that maybe your keyboard could be configured to route the notes to the correct channels, or maybe to find some software that can manipulate the MIDI before it is sent to Pianoteq. If you are using Pianoteq as a plug-in then the host software might also be able to route different notes to different channels for you.

I would imagine a MIDI hardware device permits note-on and note-off messages from adjacent keys grouped into a zone routed to a specific MIDI channel, if the MIDI device is indeed a MIDI controller.  I'm on a Yamaha DIGITAL PIANO P-95.  (Check my profile.)

Some shareware (such as MidiPipe) allows keyboard splits to channel routes.

Sixteen (16) separate instances seems unnecessary when simply you can map instead sixteen (16) MIDI events onto any of the available sixteen (16) individual MIDI channels in only one instance of Pianoteq.  I mean use just one, if you find it's preferable.

OK, you sound knowledgeable and I feel dumb. Can you tell me how to pitch bend just one note and leave all the rest alone in one instance of Pianoteq?

Some shareware (such as MidiPipe) allows keyboard splits to channel routes.

Sixteen (16) separate instances seems unnecessary when simply you can map instead sixteen (16) MIDI events onto any of the available sixteen (16) individual MIDI channels in only one instance of Pianoteq.  I mean use just one, if you find it's preferable.

Either a MIDI device or software that allows assignable zones, each with its own MIDI channel is necessary.

You may want to give one note range to one MIDI channel, while you give another to a different channel completely.  I suggest you insert recipient MIDI events (as many as sixteen {16}) with each newly inserted event having its own separate MIDI channel.  And, in the MIDI section of the PIANOTEQ Options pane and under Global MIDI Mapping, instead of the default Any, select one of the available MIDI channels (numbered 1 thru 16) for each new MIDI (Pitch Bend) event you make from the Insert button inside of the pane  —but associate each with perhaps a unique range.

It sounds great but as far as I know, you can't define note ranges or zones in Pianoteq like in Kontakt, for example. Do you mean I should load 16 separate instances of Pianoteq? I'm afraid I don't fully understand your reply.

You may want to give one note range to one MIDI channel, while you give another to a different channel completely.  I suggest you insert recipient MIDI events (as many as sixteen {16}) with each newly inserted event having its own separate MIDI channel.  And, in the MIDI section of the PIANOTEQ Options pane and under Global MIDI Mapping, instead of the default Any, select one of the available MIDI channels (numbered 1 thru 16) for each new MIDI (Pitch Bend) event you make from the Insert button inside of the pane  —but associate each with perhaps a unique range of course.

"However, you do realize PIANOTEQ software allows pitch bends assigned on sixteen (16) available (MIDI) channels.  Which might amount to a minimum of sixteen (16) varying pitch bend ranges given to sixteen (16) different notes  —one range per note."

I didn't know this, could it be a solution without any additional piece of software? I'll give it a try.

As a Pianoteq registered user you qualify for a 10% discount off the Gig Performer retail price  —plus a free demo available to just anybody.

Have perhaps a gander at this forum topic: Pianoteq in Reaper with FCB1010.

However, you do realize PIANOTEQ software allows pitch bends assigned on sixteen (16) available (MIDI) channels.  Which might amount to a minimum of sixteen (16) varying pitch bend ranges given to sixteen (16) different notes  —one range per note.

As far as I know, it's not possible to modulate/set per note detune values via midi cc messages in the standard version. Is it possible in the pro version? If not, is there any other way to detune/pitch bend individual notes using midi?