Sorry to phrase it in a sarcastic way, but an acoustic piano is an acoustic piano, and a digital is a digital! Apples and oranges.
Digitals are great for when you have fussy neighbours or sleeping family members....
I use a Yahama P120 for a lot of my practice because I live in an apartment where neighbors and family members are a big concern. The sound is a sampled C7, so it's quite good and realistic, especially when heard through good headphones. When I bought this keyboard, I hadn't tried a digital in 20 years, so was very surprised by how good the sound and touch were. Also, my piano is currently in the shop having its action totally rebuilt, so I needed an alternative for the 8-12 weeks it will take for the rebuild.
But yes, it's apples and oranges. Yahama does an incredible job of imitating the sound, touch, responsiveness, and even the pedal action (you can half-pedal with the P120) -- but ultimately it is imitation and it feels like imitation. There is a lack of physical connection with the instrument that is always present with an acoustic piano. And it's not just one thing:
1. The sound is coming into your ears from the wrong place (namely headphones). Depending on what room ambience setting you use, it can sound like you are in your living room, a small hall, a large hall, or on a large stage -- but there's a disconnect between this illusion and the reality. It's like the difference between listening to a recording and a live performance.
2. There is no sense of the vibration of the strings coming through the keyboard and into your hands or of the bass resonating in your chest. This physical connection to sound production is very important to me.
3. While Yamaha has done an incredible job of imitating response, it is ultimately overly sensitive and finicky in a way that a piano is not. It's possible to get a full range of dynamics, but the motion of the fingers/hands/arm/shoulder/back needed to produce that tone is different on a digital keyboard and a piano -- this despite the fact that Yamaha has weighted the keys to simulate the feel of heavier in the bass, lighter in the treble. When I move from the digital to an acoustic, I have to rethink tone production. Acoustic pianos require one to "dig out" or "scoop out" or "coax out" the tone (everyone's metaphor for this phenomenon is different), which connects the body directly to tone production. No such connection exists with the digital keyboard, just the illusion of a connection.
4. Acoustic piano keys bottom out on felt punchings, so at the bottom of the keystroke there is a shock absorber plus a little play in the key. Digital keyboards have no shock absorber, so the keys bottom out hard, sending a tiny shock up the arm with every keystroke, leading to fatigue far sooner than on an acoustic. Also that play at the bottom of the keystroke on an acoustic give me a feeling of depth and I think also aids in repetition. It's a little hard to explain the feeling....
5. Pedals. Yahama has done an amazing job with the sustaining pedal, allowing for very realistic-sounding half-pedaling, which is vital for almost everything I play. The una corde pedal is a joke, however. You can adjust the degree of "softness," but you cannot vary the application of it -- it's either on or off. Plus it doesn't alter the tone the way true una corde does -- there's no sense of an open string that's resonating in sympathy when the other two strings are struck. Plus, with true una corde, you can shift the hammers slightly to the right so they partially strike the third string or, on pianos that have fairly defined grooves in the hammers, you can shift so that the hammers are striking on the ridges rather than in the grooves, which gives an almost harpsichord sound. So the tonal effects that the una corde pedal allows are missing with a digital.
On the positive side, the digital is good for just learning notes and doing repetitive passage work -- both of which are extraordinarily annoying for everyone in the environment other than the pianist -- and for getting a gross sense for tone production. Plus you can practice at 3:00 a.m. if you want! But I
CAN'T WAIT[/b] to get my real piano back!
