Pianos have approximately 230 strings that need to be adjusted to keep your piano in tune. Pianos go out of tune due to seasonal temperature and humidity variations. Pianos tend to go flat in the winter when the humidity is low, and go sharp in the summer when the humidity is high. Pianos that haven't been tuned for several years may require a pitch adjustment.
Due to seasonal humidity changes, we recommend tuning your piano twice a year.