Question

قبلنا خواننده ها موزیک های اروم تری اجرا میکردن

Answer 1

Singers used to perform (play) lighter (softer/quieter/more quiet) music (in the past). 

Examples: 

Most musicians i know are usually relieved to play lighter music as a break from the heavy Bruckner or Mahler works. 

They formed Strachy Na Lachy in order to play softer music, such as rock ballads. 

Earlier in the evening we tend to play quieter music and get livelier as the night goes on.  

But if we're in a better listening environment like a gallery or on headphones, like this weekend we will play more quiet music because we like to do that.