TR, the full name is "trill", which is the abbreviation of "tremolo" in the staff.

tr is the abbreviation of "tremolo" in staff notation. The so-called vibrato refers to the rapid and well-proportioned fluctuation between two sounds. The distance between these two tones is generally no more than 2 degrees.

Generally, if it is written in the right-hand part, it is one note up. For example, the trill on 3 is a fast 3434343434. The specific number depends on the duration of the note. The symbols for upper vibrato and lower vibrato are different. tr defaults to upper vibrato, and lower vibrato will be specially marked.

The trill starts with the root note and ends with the root note. There are two types of vibrato: long and short. The short one is to write a tr on a note; the long wavy line is the one that follows the tr, indicating the length of the vibrato. The vibrato ends wherever the line ends. There is also a horizontal S mark, which represents echo.

Extended information

Staves

The five parallel horizontal lines used to record notes are called staffs. The five lines of the staff and the space formed by the five lines are calculated from the bottom up. If the musical work is written on several lines of staff, then the several lines of staff should be connected with clefs.

The higher the position of the sound on the staff, the higher the sound, and conversely, the lower the position of the sound, the lower the sound. To determine the height of the sound on the staff, it must be marked with a clef.

The clef is marked on a certain line of the staff, so that this line has a fixed name and height of the note level, and it also determines the name and height of the note level on other lines or spaces. .

Baidu Encyclopedia - Staff

Baidu Encyclopedia - TR