Layering PTQ with another soft synth

Cantabile won't work for me because I'm on Mac OS.

But in fact I found one possible (plugin host) solution: Numerology sequencer which I have had for years. It's not basically meant for live gig plugin host but it seems very promising for that too. In fact you can use it practically for anything because of its very flexible modular structure. With Numerology you can make for example a playlist with presets (= send program Changes messages to Pianoteq or VA-3) and also do TONS of different midi sequencing and modulating things. Why didn't I get this idea in first place...?

For real MIDI nerds I recommend checking this:
http://five12.net/hq/N4

Mac, thats good. i´m into this thematic
Edit: sorry for typos, my new mac is the hell for writing

first: use VST/AU Hosts over DAWs. They have smaller latencys. ( Can´t speak for Reaper tough)

to start: there is a Freeware called H-AU. It is good ! ..i used to use it.
http://ju-x.com/hostingau.html

You can have 4 sintruments in parallel, plus additional 3 sloits for FX per instrument, plus 4 master FX.
It can load only AU plugins, and no VSTs ( should make NO difference in most cases)
you even can map 16 Hardware controls/CCs to your plgunins for manual control.
Drawback: you can´t map those HW controls to the volume fader
i don´t knwo about compatibility with the newest M1 macs ( i used it on high sierra)
H-AU is super simple to learn und to create your "patches" with, just save them, and load as your needs are...........
Also is the midi HW mapping super simple to grasp and to do !

want a better Host which allows  for more ?
there is gig performer 3, which "is in my opinion" right now the edit: "coming up standard" for VST/AU Hosts. (for live on stage or in the studio)
https://gigperformer.com/
https://www.plugin-alliance.com/en/prod...mer_3.html

It has in the begin a small learning curve, especially if you want to map Harware controllers.
GP3 has super small latencys, is suoper stable, allows for extremly complex patchings and audio routongs,
AND: is super simple learn overall.
Especially if you leav out midid mapping for the begin.
the midi mapping is also easy, if you once grasped the concept, and its super powerful.
it is alos sold over plgin alliance, and there are special sales  when you can have it for 99$ ( just subscribe to the news letter)
I see quite some people coming over to the GP3 from the other two, so far co-ruling VST/AU Hosts.

GP3 is SUPER POWERFUL, while it is also the perfect choice for people who just want to start with simple things !
believe me: if one has grasped how powerfull it is to combine VST-instruments with others, and/or ro combine it with VST-FX, you will continue to expand.
works with the new M1 mac on rosetta.

for startes on mac though: H-AU...........get there a first inspiration.

also to mention:
you finally can just load several standalone applications  at once in your PC, at least its working on a mac,
and  do nothing other than set the out/audio interface as you anyway would do.
they will play in parallel just fine !
there is even no need for any plugin host
control the volume just on each instrument on its own

its my common way to play my instruments loaded in such hosts, and ended after a long surch at GP3,
and found there finally a solution that allows to do the things i want to do,
while it was easy and inspiring to dive into it ( orhers i demoed were not )

hope it helps ( just speaking for using macs )

Thx everybody!

I now have plenty of material to find the best solution for my setup which is quite unique:
Nord Stage 3 - piano and synths
Elektron Digitone - drums etc. sequencing, giving also MIDI clock and audio interface
Wernick Xylosynth - MIDI mallet controller
iConnect Mio4 - MIDI interface

And as I said my soft synths are PTQ7 and Ultra Analog VA-3. Let's see which host setup works best with stability and small latency. At the moment I am checking (my own idea) Numerology which is so flexible that you can make it to be kind of a AU-host.

on some hijacking:

is numerology just standalone or is it also available as a VST ? (guess not)
and: it is NOT running on macOS bigsur. somebody knows ? ( finally on M1 mac)