The sound names refer to CDEFGAB letters, and their pitches are fixed. Roll call is a musical term, and the name used to facilitate the singing of the melody is called roll call.

Tone name: The white keys and black keys on the piano keyboard are arranged according to fixed rules. The sound with a fixed height on each key is the note name. Modern music uses seven English letters CDEFGAB (or its lowercase ) to mark the sound name. For these seven tones of different pitches, the pitch distance between adjacent tones can be divided into semitones and whole tones. Among them, the relationship between E and F and B and C is a semitone, and the relationship between other adjacent tones is a whole tone.

When the seven basic tone levels of CDEFGAB change by a semitone, if it is a semitone higher than the original, it is represented by a sharp #; if it is a semitone lower than the original, it is represented by a flat Ь; if it is raised by two semitones, it is represented by a sharp # It is represented by a sharpening sign ×, and a drop of two semitones is represented by a heavy flatning sign ЬЬ. If the raised or lowered note is to be restored to its original pitch position, it will be represented by the base number □.

Roll call: At present, we use the seven basic tone levels in the natural major mode to be sung as do, re, mi, fa, sol, la, si or ti. Roll call is a name used when people sing music scores, and it will differ according to the pitch of the note or the change of the key.

Extended information:

Solfa: Using a number of specific syllables to represent the singing method of each level in the scale. Roll names widely used today: do, re, mi, fa, sol, la, si. It is divided into two types: fixed solfa and movable solfa.

Fixed solfa: based on absolute pitch, that is, C for do, D for re, E for mi, etc., no matter what the key is, it will never change.

Movable solfa: Also known as first-key solfa, it is based on relative pitch. Its solfa is not fixed and is based on key differences. Major keys include do, re, mi, and fa. , so, la, and ti are fixed. For example, in C major, do is sung with C sound, and in D major, do is sung with D sound, etc. Sing la, ti, do, re, mi, fa, sol in minor keys, such as la in A minor, la in B minor, etc.

Baidu Encyclopedia-Solfa