Hi. I wonder, who's the composer of the title "MUS_Concerto_For_2_Vl_Str_In_D_Minor" of the fallout: new vegas soundtrack. Can anyone help me? I think, I've heard it before but I couldn't tell who the composer is.

It's J. S. Bach.

The specific title is Concerto for 2 Violins in D Minor (BWV 1043) - 2nd Movement.