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1·Then there is also another fact: most of the music, we are going to play, let's say, mezzo-forte. 

然后还有另一个事实：我们将要播放的大多数音乐，例如，中音复音。

2·Then there is also another fact: most of the music, we are going to play, let's say, mezzo-forte.

另外这里还有一个事实，那就是我们通常所演奏的音乐，都是中等强度的，也就是说是使用中等音量。