It seems like it should be pretty simple to just record the sound of a concert grand and play it back on a speaker. In fact, that’s what we do for studio albums. Is it the sustain pedal that causes the main difference in sound between an acoustic and a digital? Or would playing both without the pedal still sound different? I actually own a pretty sophisticated digital piano, the Kawai CA49, and it sounds a lot better than cheaper pianos, but I probably wouldn’t be able to tell the difference between it and an upright acoustic.
In: Engineering
The big difference is due to how pianos make sounds. The action of the hammer striking the strings at different velocities will cause the strings to vibrate differently and cause subtle changes to the note. Unless you sampled most every key at a variety of known velocities and could play them back correctly, you’re going to lose out on those subtleties.
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