This is a normal characteristic and not a malfunction. When playing the upper register keys on a Roland digital piano, you may notice that some notes do not have a clear tone. The tone may be more of a percussive sound. Rest assured, this is a normal characteristic of the instrument and not a sign of any malfunction.
On an acoustic piano, when a key is struck, a hammer hits strings that produce the piano tone. As you move up the keyboard, the strings become shorter, thinner, and sometimes more numerous.
- The lowest notes are produced by larger, longer strings.
- Middle-range notes are generated by shorter and thinner strings, typically with two strings per note.
- The highest notes come from very short, thin strings, usually with three strings per note.
Because these upper strings are shorter and thinner, they produce a softer and more percussive sound compared to the lower strings. Roland digital pianos replicate this behavior, so the highest notes may sound quieter or have less sustain than the lower notes. This is completely normal and part of the authentic piano experience.