Changing the subject:
@Kristinaolga, I belive that a square piano will not have the full range of a modern piano. Is that correct? If so, it could present significant limitations.
Yes, musical-mc, it is true, my Square-Piano has 5½ octaves but that causes no limitations, but rather an inspiration to “navigate around it, if necessary”.
The bass-tones are very deep and growling and sound absolutely wonderful, and the high-tones sing very beautifully,
and when I lift the dampers with the pedal the mixture of tones are amazing as they flow through the air and slowly fade away...
Many of my favourite composers wrote their compositions on this type of instrument, even “modern” ones like Elgar and Sibelius.
My real challenges were practicalities like finding a teacher who loves and understands these instruments.
I had a few teachers, but they had 10 little hammers on their hands and wanted to instruct me in “hammering”,
but I did not think it was good for my Square-Piano or me.
Unfortunately I did not succeed in finding a teacher and had to research myself how to learn playing on the Square-Piano,
read music, tune the instrument etc.
Another challenge was to make the environment right for the Square-Piano, it is constructed of wood only
and it does not like Central-Heating as this would split the sound-board; in fact, it does not like any heating in the winter at all,
and it always needs a thermostatically controlled humidifier to be on, and this humidifier has to be cleaned and decalcified on a very regular basis.
The Square Piano also likes the window to be open slightly throughout the year and it likes to be tuned on a regular basis, whenever the weather changes.
But all that does not bother me at all. I am very happy that I found this Square Piano because it helped me tremendously going through a very bad patch in my life
and having me-time and focus on something new and exciting.
For example, one of my favourite pieces in music always was “Greensleeves” and I have heard many versions of it
(Vaughan Williams, Holst, many instrumental versions, many singers etc) and I always thought I would play it differently.
Finally I had a way to express how I wanted "Greensleeves" to be played and it has been great fun ever since
and as I have said, it is my favourite hobby.