Thisrelationship between the notes and their names stays the same, no matter what pitch we start the scale on. Instead of having to think about the names of the different notes in a scale, we can simply sing the scale by the solfa names, and this way we already know all major scales. We have learned it like a simple tune.
In music theory, we have a term, scale degree, which refers to the position of a note within a scale. The first note is the tonic, then they are called supertonic, mediant, subdominant, dominant, submediant, subtonic, and tonic again.
Moving down, that is adding flats to lower the pitch by a semitone, we have some options. It is good to pick one and stick to it, so after reading through this pick the version that you like best and use only that one.
When children are taught tonic solfa, they are also taught hand symbols for each note. It is not essential to learn them to be able to use the system, but for the sake of completeness, I include it here.
For someone with perfect pitch, whether we play a C or a D makes a big difference, because they can hear that these are totally different notes. For most people, however, transposing to a different key is more natural, and we can hear the melody of a scale before knowing the absolute frequency of its pitch.
Tonic solfa is a system for understanding the structure of scales and the relationship of the notes inside a scale based on hearing intervals between the notes. It helps learn different scales and key signatures, where the letter names can simply be confusing.
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