The brains of jazz and classical pianists work differently
medicalxpress.com
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Loosely, when you train a neural net repetitively in one way it adapts in order to be better at solving that specific case. While there may be some variation in initial conditions it seems likely that a lot of the variance is a result of the training itself.
I'm not sure it's possible or realistic, but I'd love to know what sorts of things we can do as a society or a species to make it so that clickbait ceases to be effective. I remember reading about a language that was designed to make it impossible to exaggerate or lie. It didn't work, but it's an interesting idea!
I think that jazz is one of those genres that, to be legit, you had to have grown up in the culture where those dominate. While people who didn't grow up around jazz can mimic it, it's not quite the same. For this reason, I think jazz has a bit of mystique around it that other genres of music do not.
This isn't only for jazz, but several other genres of music as well.
Jazz is just really, really hard. Good improvisation is incredibly demanding on both a mechanical and cognitive level. A jazz pianist needs the physical dexterity and skill of a classical pianist, but they also need to think like an arranger in real-time.
Beethoven would improvise for hours and bring his listeners to tears, and the classical concerto tradition of the "cadenza" was originally a time for the soloist to improvise and showcase his or her skills, finishing off with a trill to let the orchestra know it was time to move on. Additionally, it was commonplace for pianists to add their own flair to pieces they were playing, emphasizing or de-emphasizing elements, or adding extra musical content. (e.g., additional contrapuntal lines, turn some runs into octaves, replace some octave salvos with filigree., &c.)
In the late classical (Beethoven piano concerto #4 being the first prominent example) period, cadenzas started being written by the composer, and the composer's intentions started being seen as sacrosanct, a divine mandate from on high.
This slowly died off. Vladimir Horowitz was the last "great" pianist who regularly re-arranged the music was performing and, ironically, pianists today often perform his arrangements. (See, for example, the Rachmaninoff 2nd piano sonata, a hybrid of Rachmaninoff's two editions, which many feel is a better compromise between grandeur and thematic progression.)
Classical music was a lot more like jazz, but it has largely become a religion rather than just an art form.
WBUR in Boston did a piece on them recently here: http://www.wbur.org/onpoint/2017/11/24/eliot-fisk-rebroadcas...
In spirit, it's probably quite similar to the famous Bach-Busoni Chaconne from the violin partitas.
I love that to play an instrument with some level of proficiency, it takes physical practice. I love that to get good at dancing, sports, or martial arts - takes physical practice. That these things engage your whole beingThat part of the joy from these kinds of activities comes from the time that is invested, the changes and improvements that are experienced over time. I love that we have muscle memory - that our bodies can be trained to respond faster than our thinking mind in various situations.
To me, while it could take some cognitive work up front in terms of synthesis, composition, and arrangement - the otherwise instantaneous transmission of this product from thought to machine strikes me, at worst, as yet another technological solution for a problem that doesn't exist. Not to say that it would never be useful. Just srsly... do we need an app for everything that could ever possibly exist?
/salt
I tend to agree, but it's unlikely that jazz players possess all the skills of classical musicians plus other stuff. At some point, both start to bump into limits.
I remember Grappelli answering a question about classical. An interviewer asked him if he considered playing more classical pieces, and his response was along the lines of "I suppose I could, but why? I could take a few months to do it worse than a top classical musician would achieve in a few days. However, I do have other skills - for instance, I can improvise."
I like this answer, because Grappelli is really, really strong technically. But in the end, if you're going to spend the time developing the mental fluidity and improvisational ability for jazz... eventually something has to give. Top classical players can take on certain technical pieces that probably will elude the top jazz players.
But I agree that the article could be written to point out that nurture, not nature, is the cause of these neurobiological observations.
Headlines change
Mad things re-arrange
But it all stays the same
Like the love Doctor StrangeI feel like you're spurring some sort of argument that is a non-sequitur to this study.
And to address your argument (yeah, I know, I see the irony here) do you not feel that it's dishonest to not take nature into account? What if a study does say, "99% of lumberjacking is nature compared to nurture." Should we discount it just because it goes against our preconceived notion that we can do anything if we try really hard to achieve it?
Unless you're a Cartesian dualist, everything is dependent on the physical nature of the brain. People just need to remember that a significant portion of this nature is mutable and gradually adapts itself to whatever you focus on.
I minored in music at college and studied both jazz and classical composition/theories. One key takeaway I had from my education is that notes that may considered to be dissonant in classical music are in many cases acceptable in jazz, given the chordal context and how a player chooses to resolve it as progression goes.
I'd even expand a bit further and say that not only musician's brains work differently, but also brain activities of the audiences might differ when listening to jazz and classical pieces. Typically a classical audience might be a bit uncomfortable hearing a dissonant note and treat it as a "wrong note" while a jazz audience might think a dissonant note as being temporarily "out of box" to create tension and expect it to be resolved later.
There are also chord changes that are too complex for me to interpret in real time.
Adding to my woes, between any two wrong notes, there are infinitely many wrong notes on my instrument.
Also because I got less thrilled by microlevel effects and paid more attention about larger movements which seems prevalent in classical music.
Jazz feels like forever tripping without ever falling. Everything is twisting and tilting, and somehow the goal is almost to make it the most daring move (after all syncopation is about that) that keeps the rotation going.
haha, this is an appropriate description about playing from free jazz pioneers like John Coltrane and Ornette Coleman
All music based on western harmony is about dissonance. Or more to the point, the movement of dissonance to consonance, tension to resolution. I once had an excellent lesson that explained it to me. Movement around the Circle of Fifths is a measure of increasing tension - each step becoming increasingly dissonant, until you hit the halfway point (the tritone) and start resolving back toward consonance.
So even a simple fifth is "dissonant". It creates tension and demands resolution. It's not perceived as "dissonant" because it is "normal". It's only when you push out of the listener's comfort zones that it becomes weird and wrong. In other words, the perception of dissonance isn't musical, it's cultural.
Jazz music pushes harmonic dissonance a lot farther than "classical" does, so jazz listeners are much more accustomed to it. It doesn't sound wrong to hear tritones, or minor seconds, or diminished and altered triads, or stacked fourths. Dissonance is welcomed and encouraged. Even resolutions are often decorated with dissonance.
This is a good point.
Some of the intervals in this Frescobaldi piece sound dissonant to modern ears, but a lot of the effect comes from a pre-equal-temperament scale tuning.
Not sure why you say that. Except you're imagining Mozart vs free jazz or something. Both musics have pushed dissonance pretty much all the way.
By "a simple fifth" do you mean e.g. the note G in the key of C major? (depends what harmony exactly) or C and G played together with no harmony, or..
And when you say a simple fifth is "dissonant", do you mean it's dissonant, or "dissonant" (i.e. not dissonant)? So, theoretically dissonant, but not really?
I once lived with someone who listened to no 15 (I think it was) of Messiaen's 20 Glimpses of the Infant Jesus constantly. It's very slow, nothing but super-weird chords. After a few minutes there's a major triad, which sounds sooo weird, like a super-weird chord. So.. that makes "the perception of dissonance isn't musical, it's cultural" not sound exactly right either.
It demands resolution? In what way? Like what? You need to hear a root note after it?
>It doesn't sound wrong to hear tritones
Like in a G7 chord?
>or stacked fourths
The jazz originators of this called it a Ravel voicing.
And yes, theoretical vs actual dissonance. All note combinations but unison are dissonant to some degree. C and G, played together, are more dissonant than C and C, but not as dissonant as, say, C and B together (which is also why there's some piquant clanginess in a maj7 chord, despite its lush sound).
Also yes, in the right harmonic context, a major triad can sound really weird. But being major isn't itself proof against dissonance. If you're in D major, a D# major triad is going to sound very dissonant. "Perception of dissonance is cultural" is a generalization, I'll admit, but it's a good one. What sounds terrible to ears accustomed to Pachabel is merely juicy to ears that dig Ellington.
That depends on the composer. I'm doing Hollander currently. I got to sing a hell lot of tritoni and chromatic progressions. That's pretty difficult.
But it doesn't sound that way at all. If you hear it "from the outside" you just think "yeah, that's how it's supposed to be.
I also did a contemporary Serbian opera a couple of years back than. Serbian folk music as I experienced it always sounds a litte "wrong but cool". Was near impossible to sing, but to the listener: Yeah, sounds good.
Very well said.
As my prof for music ethnology said: There's no agreement on intervals in the world except for a prime being a prime.
I'm both a jazz fan and a "classical" music fan. I seriously disagree. The latter pushes the harmonic envelope far more -- listen to Olivier Messiaen, Schoenberg, Varese, Hindemith etc etc... and i'm only listing guys from the early part of the XX century!
It sounds like you're assuming Mozart vs Coltrane or something. Stockhausen vs Lester Young and it's entirely the other way round.
Jazz charts (and training focus) looks very different - basic chord structure and the main melody is written down, everything else is up to you - chord voicings, on-the-fly reharmonisation, improvised solos. It's a different type of training and thinking.
Of course these are the "textbook" or cliche interpretations of classical and jazz music. Classical and jazz are very broad, ultimately meaningless terms, and many musicians have experience playing a wide variety of music.
Many classically trained pianists are excellent at improvisation. Wagner, Beethoven, Mozart were respected pianists. Wagner wrote the Hollander by improvising on the piano reciting the lyrics. Beethoven was feared by other pianists for his level of skill at improvisation. Mozart improvised most of his piano sonatas as far as I remember.
Gould made a recording of Strauss songs I think. The singer said in an interview, that Gould just started to improvise in Strauss' style and harmonics (Strauss is pretty damn difficult).
Contemporary pianists often know both. Anecdotal evidence: A colleague of mine from music university studied classical piano and was a regular at jazz clubs in Dusseldorf.
It is very interesting to see differences in brain structure from classical to jazz pianists. Maybe a hint at how (muscle-)memory and motion planning is stored? A hint at how volatile brain structure is? It would be interesting to see, if e.g. a classically trained pianist switching to jazz exclusively also has a significant restructuring of his brain.
Edit: Now that I've read the article and the abstract of the paper (the paper is behind Elsevier's paywall), I understand that jazz pianists are quicker at planning new movements (a.k.a. Chord progressions) with the downside of making making more mistakes, while classically trained pianists are slower here, but faster at recognizing and repeating unlearned ("unusual") finger movements.
Would be interesting to see a comparison to pianists doing both jazz and classical music.
I would not say that, the example you give are the most reknown composer of all times. I think they are more the exception than the reality of professional musicians. Not every one is able to reach such level of genius. It seems, proficiency in both style seems rather rare. I don't think I could name a single current world class contemporary jazz player which could reach the same level in classical music interpretation.
Regarding jazz improvistion, from my little experience of amateur player, jazz musicians mostly improvise together as a band, this is not a solo activity.
This is a recent thing concerning "classical" music.
Quite a lot of music even at the time of Bach had improvised parts. (Figured bass springs to mind, but I don't know enough detail from this period. I'll let the music nerds handle this.)
https://www.youtube.com/watch?v=JZPSV78iQxg
I saw them perform the song live and he (they) really did switch styles without missing a beat.
https://www.youtube.com/watch?v=aUzknDfC_eQ
They created a beautiful medley of Moonlight Sonata by Beethoven and the jazz standard, Round Midnight by Thelonious Monk
https://www.youtube.com/results?search_query=friedrich+gulda
It's not really my cup of tea (more of a jazz guy), probably because there isn't a huge repertoire of third stream music out there, but it's definitely worth checking out if you think you might be interested.
Plasticity is normal.
Citation: Bianco, R., Novembre, G., Keller, P.E., Villringer, A., Sammler, D., Musical genre-dependent behavioural and EEG signatures of action planning. A comparison between classical and jazz pianists, NeuroImage (2018).
Link: https://doi.org/10.1016/j.neuroimage.2017.12.058
DOI: 10.1016/j.neuroimage.2017.12.058
Abstract: It is well established that musical training induces sensorimotor plasticity. However, there are remarkable differences in how musicians train for proficient stage performance. The present EEG study outlines for the first time clear-cut neurobiological differences between classical and jazz musicians at high and low levels of action planning, revealing genre-specific cognitive strategies adopted in production. Pianists imitated chord progressions without sound that were manipulated in terms of harmony and context length to assess high-level planning of sequence-structure, and in terms of the manner of playing to assess low-level parameter specification of single acts. Jazz pianists revised incongruent harmonies faster as revealed by an earlier reprogramming negativity and beta power decrease, hence neutralising response costs, albeit at the expense of a higher number of manner errors. Classical pianists in turn experienced more conflict during incongruent harmony, as shown by theta power increase, but were more ready to implement the required manner of playing, as indicated by higher accuracy and beta power decrease. These findings demonstrate that specific demands and action focus of training lead to differential weighting of hierarchical action planning. This suggests different enduring markers impressed in the brain when a musician practices one or the other style.
Highlights:
• Real-time imitation of piano chord sequences with unexpected harmony or manner.
• Genre-specific strategies at high (harmony) and low (manner) levels of planning.
• Jazz pianists revised harmony faster (earlier negativity) at the cost of manner.
• Classical pianists had conflict in harmony (frontal theta) but excelled in manner.
• Focus of practice may cause enduring brain marks at different action control levels.
In general when playing classical I miss the playfulness and individuality of jazz, and when playing lead sheets I miss the narrative sweep of classical music. At least with my pop songwriting I can try to bring in a little of both.
They're using overly dramatic language like "rewiring" to talk about a different way of thinking. Of course it's a different way of thinking, classical is performance, and jazz is improv. Nobody would be surprised if they said that doing dishes vs differentiating polynomials used different parts of the brain, but somehow it's supposed to be news that classical and jazz music do.
I don't see the word rewiring or rewire anywhere in the article.
*By swing I mean more than just syncopate with the rest of the band. “To swing” in a jazz context means to be able to play exactly in time with the rest of the band, except when you don’t (but you are in control). A very confused concept, read wikipedia for more info.
https://en.m.wikipedia.org/wiki/Swing_(jazz_performance_styl...
Although, I'm not sure that I agree that dynamics and tone aren't as important in jazz.
I'm only half joking here. I'm a guitarist, and was having a conversation with a trumpet-playing friend once. I was talking about the technical struggle of legato playing at speed, something hard for trumpet players as well, but easy for saxophones. My friend was like "Yeah, but they have to play the saxophone". Few players can get a beautiful sound out of it, and only after years of struggle. Brass and guitars, on the other hand, have naturally beautiful tone, and are easy to get to sound nice.
The importance of melody over tone, and the melodic advantages of the saxophone, explain its popularity in jazz.
Not sure why you think trumpet is vastly easier to get a beautiful sound from than saxophone. That's silly.
The importance of melody over tone? Wow, never heard of that. All you say sounds like you are judging jazz by classical (I imagine) criteria, and of course it doesn't do well.
Look at it another way... would you rather listen to doves, or geese? Tonal beauty is objective.
I've put in a couple of solid decades trying to improve my tone, and practice regularly to work on tonal issues. I appreciate the difficulty that any instrument represents.
Historically, "jazz" started in the 1890s in New Orleans, when black performers were first allowed to play music in public. They played what was available to them - marching band instruments. Saxophones, brass, bass drums and snare drums. String bass and piano were added as the music moved indoors. Banjo dominated the string section until the electric guitar was invented, as guitars aren't loud enough to compete with all the horns and drums.
And yes, saxophones have a great deal of tonal expressiveness available, especially once overblowing is brought into play. It's just not pretty tonal expressiveness, compared to other instruments.
It can be done, and I certainly do it. But it can't be all that's done, or your sound falls flat.
Jazz doesn't have a fixed ideal of timbre. The saxophone has immense timbral versatility and expressiveness, which is integral to it's role in jazz. The saxophone emphasises every nuance of breathing and embouchure. The smoother, sweeter-sounding clarinet disappeared from jazz with the dawn of bebop. The clarinet will still do those silky legato runs, it's only marginally more difficult to finger, but it just doesn't speak with the same expressiveness. A similar argument could be made about the use of brass mutes, especially plungers - they don't make a particularly pretty sound, but they're tremendously expressive.
The obvious example here would be Albert Ayler, whose playing is either exquisitely expressive or grotesquely ugly depending on your perspective. Compare his tone with Ben Webster or Johnny Hodges and you'll see my point.
Mildly cantankerous sidebar: if classical musicians really cared about quality of tone, they would have adopted the cornet a century ago. British brass bands rightly revile the trumpet as the vulgar, shrill cousin of the cornet.
I think part of the reason classical saxophone is reviled is because the "correct" tone for saxophones in a classical setting is kind of bad (with apologies to my old saxophone professor). In classical music you are expected to play with a particular tone that sounds kind of harsh and honky to me. In jazz, on the other hand, having a unique and identifiable tone - especially on saxophone - is extremely important. At least, it used to be. Compare the sounds of Ben Webster [1] (breathy, rich vibrato, almost cello-like sound in the upper register, as around 2:32 in the linked video), John Coltrane [2] (harder-edged, brighter, more pure), Stan Getz [3] (light, airy, "pretty").
But yes, you have to work at it. Unlike, say, guitar, where you just pluck the string and that's that ;)
[1]: https://www.youtube.com/watch?v=meNK2rnXDFg
As an aside, I've been intensely practicing a particular Miles Davis three-note riff (seven, if you count sounded notes rather than pitches), in part as a tonal exercise. The quarter notes need to be as intense and snappy as possible; the sixteenth notes need to be smooth and flowing. It's a really difficult shift to get the pick from "I'm gonna KILL this note" to "I'm going to gracefully flow these notes" - especially at fast tempos. I have no idea how Miles pulled it off on trumpet.
On the other hand, classical music has tone and dynamics written into the score itself. The entire point of the conductor is to anthropomorphize these features of the music, so you know when she is flailing violently you should play differently than when she is shushing you. Additionally, the tone/timbre of the whole piece is set in stone by the composer; A classical orchestra would never think it was ok to let the flutes take a melody written for the trumpets, etc.
The other great lesson came from the jazz/rock drummer, Steve Smith. He describes "swing" as the simplest possible polyrhythm - a diminishment of three against two. Once you have three against two, you can start stripping out duplicates, until your down to ding ding da-ding ding da-ding ding... sound familiar? You get a strong backbeat (2 and 4), and an anticipation note at the very end of a bar before starting the next. Now, that anticipation note can be shifted earlier or later within its own beat, making things tighter or looser.
That's swing.
A great deal of European jazz (represented by, for example, ECM) does not have have the concept of rhythmic swing. Unfortunately, there’s a tendency to talk about jazz as if the genre is purely the music of the New Orleans-Chicago corridor in early 20th century America, and jazz now has far too many subgenres in order for a claim about one to hold true for others. (Even improvisation is no longer de rigeur, and an artist may well perform from a written score.)
...which since the 1970s has had a huge amount of Norwegian and Swedish (and more) musicians recording for the label, and recording sessions are often held in Oslo or Lugano. German headquarters, but more than just a German label.
Two years only? Uh..wtf. I didn't read the original paper, but that sounds ridiculous. Why not compare them with people who'd been playing, nay, specializing in, classical for 'at least two years'. Oh, because that would be ridiculous.
I agree that people need SOME time to learn the ropes but with proper training, 2 years is enough to be good. Note that proper training doesn't mean practicing certain technique, scale or etude hundreds of times. Nowadays there are systems designed over the years by schools such as Berklee effective enough to make someone a good jazz musician within 2 years, similar to many athlete training systems. No system can make legends, but decent musicians for sure.
Also, I don't believe in "proper training". I believe in learning from the recordings of the greats, and from playing music with people. Sounds like that's how Joey Alexander learnt[0]. I believe that, like many things, jazz can be learnt but not taught. Someone trained in some system will sound like the music equivalent of the academic artist - expert at following someone else's rules, but nowhere as an artist.
[0]https://en.wikipedia.org/wiki/Joey_Alexander
edit: Most people who go to Berklee are already pretty good when they get there, aren't they? Hardly starting from scratch.
I have tried to reverse the two (play classical guitar, and improve piano) and I simply cannot, or I look like an absolute beginner.
One of the things that has really helped me with jazz is going through the older standards and singing the voice line while comping the chords on the guitar. Not only is it super fun to play and sing at the same time, but it gives a much better understanding of why the chords are there and what they're trying to do.
As an American living in Germany who taught English between IT jobs, I’ve come to describe spoken English as playing jazz, and German as performing classical music. Sure, you can put some personal touches on spoken German, and new expressions do crop up, but there’s a lot more latitude for improvisation in English, and the catchy improvisations are more likely to be picked up by other English users and become part of the language.
I thought this was my bias as a native speaker of English and very academic learner of German, but my German colleagues agree with the comparison.
English can be more fun because of the inherent ambiguity, but any parallels to jazz and classical music are a little far fetched.
Lately I've been hanging out on the English Language Learners Stack Exchange. It can be a discouraging place. Too many people answer simple questions with complicated explanations of English grammar, when the real question they should answer is "How can I say this the way a native speaker would?"
An example:
https://ell.stackexchange.com/questions/152764/is-this-sente...
OP wanted to know if this sentence was correct:
"Your kindness has (and will continue to) made a difference."
The top-voted answer explains that "This sentence is an attempt at parallelling, where a sentence branches into two or more parts. In this case, it also rejoins at the end. The parallelled part must join on to the common part in the same way." And that's just the beginning. The answer goes on to explain about "eliminating the duplicated word sequences" and finally arrives at this sentence:
"Your kindness has made, and will continue to make, a difference."
That's grammatically correct, but hardly any native English speaker would ever say or write it. In fact, someone commented that the sentence "sounds more German than English to me."
My zero-rated answer was "I like to find the simplest way to say things. You can thank a person for their past, present, and future kindness all at once: 'Your kindness always makes a difference!'"
I don't care much about the votes, I'm just a bit sad that so many of the high-rated answers on ELL seem to answer the technical questions of grammar instead of helping people sound like native English speakers.
Can someone ELI5 (and essentially never played) what they mean by harmonically unexpected chord within a standard chord progression?
edit: formatting
I can't speak to to technical strictly music theory definition of jazz, especially given that jazz now is really just an umbrella for myriad sub-genres, but from my experience the beauty of jazz is that the resolution is not predictable, and more often than not it may make one feel vulnerable, or sad. See classics like Miles Davis, Bill Evans, or for someone alive today, Dr Lonnie Smith.
Musicians, especially those focused on classical music, are so used to the standard chords that it feels really weird to play a "wrong" chord progression.
You've probably heard of complementary colors and the color wheel in the context of art. The idea there is (afaik) that some colors are thought to go "better" together and they're used more often together to create certain effects that seem more naturally fitting. If nothing else, there are color pairs used often together, by convention.
Music has a similar construct in chord progressions. Chords (combination of pitches played simultaneously) sound as if they "naturally progress" from one to another when played in certain orders. For example, lots of pop songs will use a I-vi-IV-V progression over and over again, because 1) it's conventional and popular and 2) it sounds "natural" i.e. like it belongs together, the same way some colors might to an artist.
What they mean here by _harmonically unexpected chord within a standard chord progress_ is that they started with a standard, conventionally popular progression of chords, then (I assume) replaced one (or more) of the chords that follow that progression with one that doesn't, which creates a feeling of dissonance since they aren't supposed to belong together, classically speaking.
Hopefully this is an adequate portrayal -- not trained in theory, just a casual songwriter.
In western music, chords and chord progressions are constructed according to certain rules (google "harmonization of the major scale") that are now familiar to most listeners. Actually, many pop songs share exactly the same sequence of chords. This contrats with jazz which tends to bend the rules.
https://www.youtube.com/watch?v=oOlDewpCfZQ
So unexpected harmonies are sequences that don;t fit in to these well-known, 'standard' progressions.
Like, usually we go to work and then home. But some days we stop by the bar. Maybe we planned a trip to the zoo and stopped for ice cream afterwards.
That all seems normal-ish to me.
But sometimes it's like, we are on our way to school for the day, but let's stop off in Times square for 5 min, and then Mount Rushmore, and then a dentist office in Iowa land on the moon, get a hot dog... and now we are at school for the morning.
But very rarely would you play a C chord followed by an Eb major chord in folk music. But if you're playing Jazz, you might be more open to that possibility.
The study included people who aren't at all like Jarrett (they are either/or musicians, while Jarrett is a both and then some musician), so the quote felt vaguely forced into place.
The question is: how does such a study decide whether the 'brains ... work differently' because the tasks are so unalike, or because the brains themselves are somehow different.
Another question is proficiency: clearly 'virtuoso' pianists are different from 'amateurs' on both sides of the aisle. Are the brains of the 'virtuosos' more 'different'?
But that always stuck with me, and makes a lot of sense considering patterns and preciseness that you need when playing piano or some other instrument.
http://www.classicalmusicblogspot.com/horowitz-and-tatum-whe...
https://www.youtube.com/watch?v=Y8HzMEwobvM
Classical piano:
Besides being trivially true, MOZART WAS A MASTER IMPROVISOR!!
Classical musicians were great improvisors for generations… until the late 19th century boon of the symphony orchestras and all these conservatories focused on getting musicians to follow the notes perfectly and watch the conductor and ignore creativity. In the 20th century, improvisation was rubbed out of classical music.
Today's classical pianists are pathetic improvisors. But don't think Mozart or Beethoven or Bach etc. were like that. They were much more like the jazz pianists.
This study is mostly just further proof of the tragic impoverishment of classical tradition over the last few generations.
Miles Davis was a Jazz musician. Classically trained. He was /also/ a pianist.