Tonight I will NOT be listening to the Brahms Requiem on my mp3 player.
There's a terrific build up in the third track ("Lord, let me know mine end") with an increasingly powerful bass. What with the cellos and timpani, all possibility of sleep was driven away. I lay there, ears ringing with the repeated hammer blows of the thundering notes.
The end came, and there was a silence.
That's when I realised that the motor of the oxygen concentrator is also in D major.
No wonder the harmonies were so overpowering.