将以下文本中的语法错误标记出来并给出修改建议。



“Although I really enjoyed the concert, but I was disappointed that the band didn't play my favorite song. Also, the sound quality wasn't good.”
语法错误：句子开头的Although后面跟着but，造成重复。 

修改建议：Although I really enjoyed the concert, I was disappointed that the band didn't play my favorite song. Also, the sound quality wasn't good.