The sound of the music seems to tell us what kind of person is playing. We feel that we can hear their character or personality in that which they are presenting. Obviously this dramatic dimension of the music usually comes from the qualities of the music. In such situations the music implies a character who produces those sounds. Just as there is no life without death, however unpredictable, so there is no music without implied character, however nondescript.
Some people speak of instrumentalist as having found their own voice.
We must remember that to attain one's own profile is not easy. Miles Davis has said that it takes years to sound like yourself. This could be because the musical language we think of and experience as private ideas are in fact constituted through the voices of other musicians that echo in our listening experiences. Nevertheless, when some other musician's ideological concept is internally persuasive for us and acknowledged by us, entirely different possibilities open up. The listener, moved to a frame of mind by the music, senses the character of the musician.