Piano Manufacturers and Brands: A discussion!

Maria It's what I have thought all along: We are talking about tolerances in manufacturing during the pre-CNC era. 0.5-1mm in tolerance is nothing to write home about in terms of manually producing a precision keyboard assembly, especially across the range of 7-8 octaves. The 0.5mm-1mm in the bass section will be evened out by the same metric in the opposite direction and thus give you a feeling of consistency.

CNC was only invented in the early 1950s and it took a couple of decades to find its way into piano manufacturing. Most likely Yamaha and Kawai were at the vanguard of introducing this into their manufacturing process some time in the early 90s.

The notion that some Steinways from 100 or more years ago had a noticeably different - and consistently so! - keyboard scaling from those models manufactured 20 years before or after that simply doesn't hold water to me and is explained by bias at best - and it is noticeable that during the whole discussion about this subject in the forum no hard measurement results were introduced to prove a point in one or the other direction.

I can provide measurements with calipers on 5 different pianos by tonight: The notorious 1887 NY D, my 1886 NY/Hamburg bastard B, a 1900 Bechstein model IV, a 1967 Bösendorfer 225 and a 1970s Hamburg B - and right now and here I am willing to bet a substantial sum on a result that will show very little diverging values that can only be explained by manufacturing tolerances of the pre-CNC era.

Is anyone game and can or will come up with a measurement regimen with robust results?

I present you measurement of key width across three different pianos:

• 1967 Bösendorfer, 225cm
• 1970 Steinway B 211cm
• 1887 Steinway D 269cm:

I sampled a couple of keys of each piano and the variance is basically what you can see across three different model from different eras.

So, we are talking about a maximum variance of 1.5 Micrometer across the whole range - which is significantly less than assumed earlier on. It also means that even in pre-CNC times the production precision was already on an extremely high level, in an obviously standardized width of the white keys.

I will tonight sample the 1900 Bechstein 220cm as well as my 1886 Steinway B. I am pretty confident that both will end up in the same ballpark. 

Peter Lemken, clavierhaus Thank you for the information. I am not a piano tech and do not have an easy way to measure pianos' keys; if I did, I definitely would. I did not take photos when I was at the piano store that had a 1900s Steinway upright with a noticeably different key width next to a 2018 Steinway D.  

Peter Lemken, clavierhaus said:
it is noticeable that during the whole discussion about this subject in the forum no hard measurement results were introduced to prove a point in one or the other direction.

I don't have measurements and was not making an argument; I was asking a question that I should have phrased differently. I also was not specifically referring to pre-CNC or post-CNC pianos. 

Noel Nguyen recently I was reading a book and came across Hoffman. Absolute genius !. Rachmaninoff thought Hoffman was the best of that time which included himself and Conus - per the book ( I am not qualified to speak lol! ) . Every bit of video available of Hoffman playing is fantastic. Watch his version of Chopin :-) .. The speed and clarity at speed is from a different planet. Also learn't - that he was huge inventor with close to 70 patents!..

Peter WilliamAnd imagine if the narrower keyboard was a key factor!... I know it's unlikely but still.

Noel Nguyen I read that Anton Rubinstein hated child prodigies but called Hoffmann "the greatest musical genius the world has ever known.”

Noel Nguyen Maria we may have read the same book. :-)

Peter William which one did you read?

Maria "Basic Principles in Pianoforte playing" may be that one. Hard to pinpoint exactly since I read about 300 pages of 2 other books in the past 2 days on a different subject.. 

Peter Lemken, clavierhaus Hi Peter. What does CNC refer to? Thanks. I did a little research --info which you probably already know-- after seeing Maria's reference to "stretto" pianos, and those are modern custom-built narrower-width keys/mechanisms that are then retrofitted into a piano. The 1930s Steinway I played DOES have noticeably narrower keys; I can stretch an 11th on it but only a 10th on most others.  I'm wondering if this 1930s I played was rebuilt and if the keys/mechanism is not the original? (Its owner doesn't know). And as I also stated, our 1980s 6 foot 3 Baldwin has narrower keys than Steinway, but not by as much. The Baldwin was not retrofitted but is the original. When the width differences are larger, it can affect my playing (but not disastrously). 

Andrew Smith I believe CNC stands for Computer Numerical Control. 

Maria I hate child prodigies too. When I see one, I can't wait until they reach adult age, to make me feel better about myself.

Andrew Smith As Maria said, CNC stands for Computer Numerical Control and in essence is CAD/CAM i.e. Computer Aided Design and Computer Aided Manufacturing. It boils down to having machines do a faster and more precise job in manufacturing than humans.

I am surprised you still maintain that "The 1930s Steinway I played DOES have noticeably narrower keys". I had imagined that my measurements would have shown a distinct pattern, but obviously they did not so I won't bother you with more images of my Bechstein and 1886 B measurements - which were exactly as I expected them.

I'll leave it at that; I just wonder why no one has bothered to use calipers (not that this tool is an exotic one - it isn't) to give one's claim some substance that we can actually discuss. 

I am used to be the voice crying in the wilderness (Anyone remember Joyce Hatto?), in so far I look forward to being proven wrong and learn something new. Until then I can only say that I don't trust statements of something being "noticeably" something without measurements to prove the claim.

Peter Lemken, clavierhaus 

As I said, I don't have calipers or easy access to different pianos to measure. I believe you that the pianos you have measured have not had very much key width variation. If I have a way to measure noticeable key width variation, I will post the measurements here. 

Peter Lemken, clavierhaus said:

I am used to be the voice crying in the wilderness (Anyone remember Joyce Hatto?)

I was just reading about Joyce Hatto yesterday.

Peter Lemken, clavierhaus Next time I am there I will measure the 1930s piano key width. I think it's incredibly presumptuous of you to imply that I'm making some erroneous claim about what my own hands have felt and eyes have seen. It wasn't some vague sensation; it was a clear difference. And your measurements were not on the piano I've played. I'm not talking about your Bechstein. I was trying to add useful information that some pianos are retro-fitted with custom stretto/narrower keys and that that might be the case on that 1930s piano I played. 

Maria https://www.newyorker.com/magazine/2007/09/17/fantasia-for-piano

Peter Lemken, clavierhaus I read that article.