The tr on the piano staff means vibrato. 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 3434343434343434. 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. In addition, there is a horizontal S mark, which represents echo. Extended information

The vibrato has a longer duration, so it can express a sense of breadth and vastness. A tonality is a grace note that starts with the main note and moves up or down quickly between adjacent notes.

Vibrato is as diverse as vibrato, including fast vibrato, slow vibrato, from no vibrato to vibrato, slow vibrato to fast vibrato, vibrato while rubbing, vibrato while sliding, second vibrato, and third vibrato. Etc., these vibratos can express different musical styles. The sound is formed by adding a short auxiliary sound above or below the two main sounds. Boeing can be divided into straight Boeing, reverse Boeing, single Boeing and complex Boeing.