Allchopin wrote:
“I think I have tried this once, only to admit defeat. I definitely cannot do this on the fly- way too much thinking for this pianist- but after a little practice I could do it.”
Thanks for the input. I find this practice very useful, but in the beginning I found it almost impossible to do it by ear/position. So I started relearning the piece from the score (transposed). After the first key changes, something clicked and now I can do it, for simple pieces. I wonder if Earl transposed the study on the spot (seems unthinkable at my present stage) or if he just relearnt it from scratch in D major.
”I don't think Earl knew what he was talking about- pitch cannot simply "change"- it is a set frequency of sound waves. Perhaps the measuring equipment has changed, but not pitch, and it never will.”
He knows what he is talking about. It has nothing to do with the pitch itself or with equipment. It is a matter of convention. There is no reason to associate middle A with 440Hz. At the beginning of the 20th century a bunch of musicians got together and decided that A would be 440 Hz and that was that. Before that there was quite a lot of variation both in regards to time and place. So for instance, Mozart used A = 421.6 HZ; Handel used A = 422.5 Hz, and Bach used A = 415.5 Hz. Concert pitch in Berlin at mid-eigthteenth century was A = 422Hz.
Only after 1820 did concert pitch started to rise (by a decision of the musicians involved, not because the pitch itself increased, or the apparatus changed) simply because they wanted to produce a more brilliant sound. In the 19th century it was basically the French musicians who pushed standard pitch ever higher so that their music would sound more brilliant.
In fact, nowadays, most orchestras tune to a pitch that is actually higher than 440 Hz.
If this interests you, have a look at pages 495 - 504 of “The sensations of tone” by Hermann Helmholtz (Dover) where there is a huge table listing all the pitches that have been used (mostly in Europe) from 1361 to 1900.
Best wishes,
Bernhard.