The economic climate of the past three years has certainly affected the musical instrument business, but not always in the expected ways. There were rough patches last year. But it wasn’t all doom and gloom. In early 2011, Parkway Music, a fixture in Clifton Park for the past 18 years, moved to a new building at 1777 Route 9, two miles down the road from its old location. Drome Sound in Schenectady also found a new home last year, moving into the building that used to house Latham Paint, 1875 State St.