The term HIGH TONE can be broken down into two crossword solutions: TING (4 letters) and ALT (3 letters). TING is a word used to describe a sound, usually a musical one, that is high-pitched and clear. ALT is an abbreviation for the musical term 'ALTO, ' which is a type of vocal range that is lower than soprano but higher than tenor. Together, these two words form the phrase 'high tone, ' which is used to describe a sound or voice that is both high-pitched and clear.