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pianoloverus It's just a prototype for a study. It's not meant to be an actual training tool. But the study results suggest interesting possibilities.
Robot hand trains speed by wiggling human fingers
I imagine any effect from this is probably related to building mind-body connection.
I think a similar effect occurs when you have e.g. a right hand part with both melody and inner voices and practice voicing by playing the melody with the RH and inner voices with the LH. The mind is better able to reproduce "good" once it has heard what "good" sounds like, and doing this makes it easier for you to hear the actual sound you want and improves voicing when you go back to playing it all with the RH. This device would be like that, but showing you the physical (rather than aural) experience of "good" (many caveats here, not in the scope of this comment) that lets you then reproduce it more easily afterwards.
"You're a smart kid. But your playing is terribly dull."
@rsl12 thank you for the additional thoughts and quotes. I read the info and I think I read it in the original abstract. I hope I can get my thoughts out. It may really be worthwhile to look at all sides of this and not just the device itself.
How practising is done is crucial for getting any skill needed for playing a passage, or type of passage. This is not looked at, at all. It suggests there is no awareness of this factor. The quote refers to frequency and length of practice, but not nature of practice.
We can look at the experiment two ways:
a) Those practising in normal ways (with some variants to frequency, etc. versus those doing so but also adding this device. That is the presentation and mindset.
b) Same as above, versus doing a practice that is aimed directly at the skill of speed (using the device). You have two things going on.
You might find, for example, that if you had one group doing an extra type of practice that aimed specifically for speed and not the piece, that they might also increase their speed by 6%. The new factor might be "aiming at speed in various ways", or "aiming at speed via a device", or "the device".
I found this in the article about the person who came up with the idea, and then had engineers develop it within their expertise:
Furuya used to be a professional musician. “I practiced [piano], like 10 hours every day,” he says. He practiced so much that he developed a movement disorder in his hands. It’s why, he says, “I changed my career from pianist to scientist.”
His hands are doing better now. And he still plays and teaches piano. But a few years ago he also started imagining a new way for musicians to practice. “I was thinking maybe we need some kind of a robot that can teach how to move the fingers,” he says.
He practised 10 hours a day and he ruined his hands, but managed to recover. How did he practise? How was he taught to practise? Possibly along the lines of what MG describes as "traditional" or similar. We have But a few years ago he also started imagining a new way for musicians to practice. It is very likely that he only knows the way of practising that he himself was taught and did. "new ways" (various) already exist.
We tend to be too enamoured by things that are scientific, and that went through trials with one group doing this, another group doing that. These trials are artificial and restricted. They do not contain the many things that excellent teachers do in their quiet corners that only their students are aware of, if they even caught on to what is behind the scenes of what they were taught during their years of instructions.
There MAY BE something useful in this device. It may be due to what it intends to do, or what it accidentally ends up doing right. I just want to look at all sides of this issue.
Broad thoughts:
In practising, in overcoming problems in our practising or reaching toward what we want to do and can't yet do - we have to look at how we're doing it. This also includes the real nature of the problem, and then solutions. The solutions might be surprising and coming from unexpected sides. In that sense, the device might play some kind of role.
When I looked at why I was "snagging" in the long trills, one element was how deep I was playing into the keys, and how high to do in releasing them. A device that wiggles my fingers up and down will not give me that - it's not going for the problem and its solution. If I'm being "effortful" and the device trains me into a more relaxed passivity in the hands, then it would help in that area.
What bothers me is if people people we play the piano with the fingers, and this device reinforces the idea. There is the whole motor apparatus. Plus, we don't just play in 5 finger position on white keys staying in one spot the whole time.
It is certainly interesting to think about among many (countless) things. But if "fast fingers" is the main concept, I'd want to go quite a bit broader than that.
Yes,> keystring In practising, in overcoming problems in our practising or reaching toward what we want to do and can't yet do - we have to look at how we're doing it. This also includes the real nature of the problem, and then solutions.
Yes, this is what I was talking about when I said that particular exercise in the video and in the experiment was so unusual in terms of actually occurring in real music that even experienced pianists might not know the right way to practice it. So that could be the reason why practicing it on their own without the device didn't help.
@pianoloverus - you seem to recognize the passage. Can you name it? It would be interesting to see what kinds of advice comes up on-line for practising it - for seeing variables.
keystring - you seem to recognize the passage. Can you name it? It would be interesting to see what kinds of advice comes up on-line for practising it - for seeing variables.
It's a double note trill using the fingers 2-4 and 3-5 on white keys. I doubt there's anything online about practice in it because to the best of my knowledge a drill using that fingering never or very rarely occurs in actual music. 1-3 and 2-4(5), For example, would be the usual fingering to the best of my knowledge.
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pianoloverus It's a double note trill using the fingers 2-4 and 3-5 on white keys. ....
Sorry - I thought I had remembered you mentioning an actual piece. I scrolled further up and found a reference to the Chopin double third etude and found it. If the demo had been with that etude in mind, I had wanted to compare the type of advice one might find, with what the demo did. Well, the demo isn't about that so that's moot.
keystring The opening trill in the double thirds etude and a few other places in the piece where there is a trill are played with a very different fingering so I don't think any comparison with that piece would be relevant.
Yes, I saw that.
I no longer own my Definitive Biography of PDQ Bach but as I recall the maestro invented a mechanical keyboard 'practicer' which the student inserted his or her hands into and they worked the piece just like your robot. Alas! he also included a fingernail clipper into the Praciticer which resulted in a countess losing the use of her hands.
Schubertian2 no longer own my Definitive Biography of PDQ Bach ....
lol - Anyone not familiar with PDQ Bach should do a quick google. 
keystring By letting the device move the fingers, and with a pianist's training to relax the hand, if the fingers are being move passively, maybe that in itself is part of what makes it work for these pianists.
TheBoringPianist I think a similar effect occurs when you have e.g. a right hand part with both melody and inner voices and practice voicing by playing the melody with the RH and inner voices with the LH. The mind is better able to reproduce "good" once it has heard what "good" sounds like, and doing this makes it easier for you to hear the actual sound you want and improves voicing when you go back to playing it all with the RH. This device would be like that, but showing you the physical (rather than aural) experience of "good" (many caveats here, not in the scope of this comment) that lets you then reproduce it more easily afterwards.
Two interesting theories, and they both jive with the result that there were left hand improvements, even though the device was only used on the right hand.
Schubertian2 I no longer own my Definitive Biography of PDQ Bach but as I recall the maestro invented a mechanical keyboard 'practicer' which the student inserted his or her hands into and they worked the piece just like your robot. Alas! he also included a fingernail clipper into the Praciticer which resulted in a countess losing the use of her hands.
Too bad he didn't also build in a first-aid kit.