Piano is very easy.Take two complete newbies who have never been exposed to any musical instrument. Give one a piano and the other some other instruemnt of your choice (e.g., flute, oboe, violin, guitar, French horn, etc.), teach both how to play "Mary Had a Little Lamb" on their respective instruments. Chances are, 99 out of 100, the one given the piano will learn "Mary Had a Little Lamb" before the other, hench very obviuosly demonstrates that piano is easier to learn.On anything other than a keyboard instrument, you have to learn tone production. Most people have to spend substantial time and effort to learn to produce ONE tone on, say, a violin, flute, french horn. On a piano, most any moron can, without any prior training, press a key and produce a sound that is already a tone, and quickly move on to learning to play a tune. The only thing easier to learn than a piano would be a digital piano -- you need only to find and press the "Demo" button to instantly "make music."
The piano can handle extremely complex music -- complex as in "sounding many tones, carrying many melodic lines, allow very fast run of notes, all at the same time." The piano is "more difficult" than other instruments ONLY when you play music much more complex than what you can with most other instruments.Without giving a rigorous definition of "complexity," (let's just vaguely define "complexity" as some combination of {how many notes sound at the same time, how many "lines" are carried at the same time, how fast you have to go from note to note}), I'll venture to say that piano is easier to play than most other instruments at any complexity level.Low complexity: make a tone -- piano is easiest.Low-Medium complexity #1: carry a tune -- piano is easiest.Low-Medium complexity #2: fast run of notes in a single line -- piano is still the easiest on which to play fast running notes in most cases.Medium complexity: carry a tune with simple accompaniment -- piano is easiest (much harder on harp or accordion or lute-like instruments, practically impossible on bowed-string and woodwind and brass instruments).Medium-High complexity: carry multiple tunes simultaneously (polyphony, counterpoint) -- somewhat difficult on piano, practically impossible on everything else.High complexity #1: multiple tunes plus busy accompaniment plus fast running notes -- difficult to extremely difficult on piano, but impossible on other instruments.High complexity #2: all the above plus multiple distinct timbres -- not possible on piano, have to move to organ or electronic/digital keyboard instruments.At any level of complexity, the piano is easiest (of course you can generalize that to most keyboard instruments). The piano is difficult only when you are already making music too complex to be handled by most other instruments.The only aspect of difficulty where it's hard on the piano while easier on other instruments is to moderate the tone of a note -- it's much easier to make one note sound in many different ways on a string or woodwind or brass instrument, but very difficult to impossible on an acoustic piano (but easy again on a organ or digital/electronic keyboard instrument).Conclusion: Overall, when taking many different levels/types of complexity into account, the piano is still the easiest (well, along with a organ and electronic/digital keyboards).
Here is a thought: the literature for the piano is the most difficult, rich and demanding, because the piano is an easier instrument to play.
Here is a thought: the literature for the piano is the most difficult, rich and demanding, because the piano is an easier instrument to play.There is simply no question that NO other instrument has literature of the complexity and difficulty of, say, Gaspard de la Nuit, let alone the really hard stuff (like Godowsky Etudes, Sorabji's OC or Boulez 2nd sonata).This incredible literature would not be possible if the instrument was as hard to play as a French horn (where the simplest passages are a big challenge even for the most accomplished professionals).The piano is very easy to play. Piano music is very hard to play.