朋友你们好!请你们帮我看看,这个调音器怎么样?调的音准吗?用起来复杂吗?http://www.amazon.cn/ENO%E4%BC%8A%E8%AF%BAET-39%E5%90%89%E4%BB%96-%E8%B4%9D%E5%8F%B8-%E5%B0%8F%E6%8F%90%E7%90%B4-%E5%B0%A4%E5%85%8B%E5%88%A9%E5%88%A9-%E8%B0%83%E9%9F%B3%E5%99%A8/dp/B00DW3KTWG/ref=sr_1_7/476-4967523-3192955?ie=UTF8&qid=1386131593&sr=8-7&keywords=%E5%B0%8F%E6%8F%90%E7%90%B4+%E8%B0%83%E9%9F%B3%E5%99%A8谢谢!