I found it terribly beneficial. (publisher used to be Rubank) As far as duos and trios, if you can transpose you will have no problem, but there are even many transcriptions of Baroque music arranged for several wind players.

• 是的，达到较好的音色不是太大的困难，特别是你已经知道什么是美丽的音色，从你的记忆中复制就可以了，不要偷懒去满足于一些稍微差那么一点的音色。