雅马哈U1调音和手感调整

youtube.com/watch If you want to maintain the best performance of a good piano, in addition to proper maintenance, in general, the piano must be adjusted once or twice a year. If not be adjusted for too long, it will be easy to cause permanent wear parts, or in the next tuning it will affect the structure due to the tension […]

雅马哈U1调音和手感调整