The term 'brought into harmony' can be described by three crossword solutions: 'tuned' (5 letters), 'ATTUNED' (7 letters), and 'keyed' (5 letters). Tuning an instrument is the process of adjusting the strings to the correct pitch, while attuning is the act of bringing two or more things into harmony. Keyed is a term used to describe when an instrument is tuned to a specific key. All three terms refer to the idea of bringing something into harmony.