Oh wow, great example and ideas Gilles.
Gilles wrote:In fact, maybe the contrary might be needed sometimes when you play something that has little dynamics and you would rather consecutive notes be very even. This may be anathema, but a staircase velocity curve like this one could do the trick.
That staircase velocity curve takes me back to the 90s dpianos! (persevered with 7 steps in some of those). I think a lot of people in my range of experience in the 90s thought we played OK because of those infallible dynamic 'rails' on old dpianos to stick to.. it is exponentially more intricate on real pianos, to reliably drag out all the same sonic personality desired for each repeat performance (even for simple pop/experimental stuff I used those old keyboards for).
Pianoteq's default flat velocity curve seems to work better and better over the years it has to be said.
For my uses though, any velocity curve (not just a Pianoteq thing) is never about just 1 'exactly correct' curve which is supposed to fit the dpiano like a glove with, fully work for all pianos/presets with my board.
I understand the desire to get 1 curve, done. But I think it's missing many sonic opportunities, to believe it possible - and it's possible to enjoy when it's brighter, darker, etc.. for individual pieces/piano/preset combos.
I tried for myself over years to crack it beyond any sense of right/wrong/good/bad/placebo etc. Every time I think "This is it" - I find later "No, this is it!" - and with small differences, each 'nearly perfect' curve just elicits something I like at the time (or for a piece) about the engine's response to it. So, to me finally I'm definitively of the opinion that, at least I'm OK with there not being a single perfect curve for me - with any VST it's the same. (Recently big weather variations hit - and wow everything about the audio in my space was vastly different thanks to the weeks long ramping up and down of severely strong changes in temps/humidity/rain/drying etc. - the room changed key, and piano went all kinds of ways with velocity - about 2 months to stabilize - no curve would make that better).
To explain my experience a little more - a curve can really enter into any project of making personal presets, going hand in hand with decisions about hammer hardness in those 3 ranges and many other tangential controls.
Sometimes I just want an already enjoyable preset to play a little darker in low velocities, and moving the velocity curve (even tiny amounts) allows instantly less treble/high-overtonal development for that example.. it may be a better quick solution to re-balancing hammers/direct sound duration/impedance etc. I often make things for others with pushed/pronounced aspects for them to taper down to their own tastes - and sometimes I provide a curve but will often expressly say "you'll need to tame it for your keyboard - or begin with default curve instead - but take note of the way it alters the timbre" etc.
Should go without saying, that velo curve alteration will always only work exactly as intended for our own keys (even same make/models will differ from manufacture, temps, humidity etc.) and a custom velocity curve, although it could turn out kind of instructive to other users maybe, it would still require for them to tweak to 'get it' the way I might have intended.. so not something to share in FXPs if that's not obv.)
Mostly I finish with a custom preset when I've recorded the piece I tailored it for.. so not a thing which gets bothersome for me - as I do tend to keep moving on to yet another preset config thereafter - racking up many presets with single use cases, which I rarely revisit except for ideas about how I might proceed with a new edit.
Not sure I'd want to have anyone but skilled pianists' curve data to make any machine learning from - that age old prob there of 'garbage in = garbage out'. Just because many users choose default, or very radically different custom curves, in this case doesn't give me confidence that any good input can be derived, unless limited to Phil Best and other Pianoteq users who might be skilled beyond a certain level, enough to give super useful alterations.. and even then, the pool could be so small, there's no good aggregate, so might as well poll these talented folks individually - but I'd suspect, there's no single useful curve for all.
We all like to hear different aspects of the piano, and different curves allow that in concert with all the other controls - I think it's default is good enough for new pianists to get a hold of, small changes like the ones in the curve page provided by other users, trial/error etc.. then one day, like myself, a personal view of how the curve helps/harms what we're trying to tweak for - and hopefully with time and skills developing, anyone working on it can find a handful of good curves to express any tweaking desire they may have.
Interesting idea @levinite! Thanks for the thoughts of others - all inspiring to me.
Pianoteq Studio Bundle (Pro plus all instruments) - Kawai MP11 digital piano - Yamaha HS8 monitors