Not strictly speaking, different tonal performances of the same work are not much different, and the essence of music remains unchanged... But in practice, there is a big difference.
For example, the music in C major is played in G major, either the overall height is five degrees, or it will be four degrees lower, the timbre is different, the sound area is different, the musical tension is different, the difference in the string music may be greater, if it is a vocal, it may not be able to shift the tune at all, because it cannot be sung or sung down...
Music is a bunch of vibrating sound waves presented in time. From a physical point of view, there is a natural connection between timbre and color, they are all a kind of fluctuation, but their properties and frequency ranges are different.
Modern science and technology have developed, sound and light can be converted into each other, as we all know, ultrasonic waves can be imaged (although people can't hear, but also vibration waves - sound waves), then sound waves can actually be imaged. Light can also emit sound: photoacoustic spectroscopy can use pulsed light to make sounds, tattoo method can detect sound with light...
Tonality and visual transformation are therefore also entirely possible.
The ancients found that the proportion of the sound wave frequency of seven pitches within an octave roughly corresponds to the proportion of the seven colors between the corresponding light wave frequencies. Scientist Newton has long verified that the seven colors of red, orange, yellow, green, cyan, blue, and purple are equivalent to seven tones of C, D, E, F, G, A, and B within octaves. What is more interesting is that in 1929, the Russian composer Sabanev believed that the five tones of C, D, E, F, and B were equivalent to the five colors of gray, yellow, blue, red, and green.
Different colors give people different feelings, and so do different sounds, and the same is true for different tonalities (an ordered set of sounds). Auditorily, because each person's sensitivity is different, there will be differences in hearing, and the atmosphere felt is not exactly the same. Russian composers such as M. Khsakov, Scriabin, and others all have their own tonal color tables.
Rimsky Korsakov's tonal color table holds that: white in C major, brownish yellow in G major, golden yellow in D major, bright rose in A major, sapphire-like turquoise in E major, iron gray in B major, gray-green in #F major.
Scriabin's insight into tonal colors is that as the number of ascending key signs increases, the sense of color moves from red to purple in spectral order: C major is red, an ascending G major is orange and rose, D major is brilliant yellow, A major is green, E major is light blue, B major is iron gray, #F major is azure blue, and so on.
The French composer Messian attaches great importance to musical color, once told the audience: "To understand the timbre, harmony and combination of sounds in my music, you must love color, you must be sensitive to color... understand the connection between sound and color." ”
Some people associate the works of composers of different styles with color: it is said that Mozart's music is blue, quiet and lively, solemn and laughter; Chopin's music is green, in fact, Chopin's music is very colorful, but the base color is the fresh green among the trees; Beethoven's timbre is black, solemn and great, full of philosophy, like an official car, too many colors are secularized; Debussy's tone is very beautiful, it is said that his ears are extremely sharp, he can hear some obvious overtones, the voice in his brain is much richer than ordinary people, and the hearing seems to have several dimensions, which is simply a dimensionality reduction blow for us. Wagner music flashes different colors and so on.
