Get ready to feel moody with "Piano Concerto No. 15 in B-Flat Major, K. 450: I. Allegro (String Quartet Version)" by Sleeping Pills Collective. With a 160 BPM and 3 time signature, the rhythms flow in A♯/B♭ major. Spanning 2 minutes and 35 seconds, "Piano Concerto No. 15 in B-Flat Major, K. 450: I. Allegro (String Quartet Version)" radiates low energy from start to finish. Let the moody vibes of this track carry you away.