31. The tempo then changes to " Pi?lento " and the key signature reverts to D major. 32. The song has many changes in time signature and key signature , and even incorporates some musique concr�te. 33. However, Piston's characteristic flexibility of tonality and thickly chromatic harmony makes it simplest to omit key signatures . 34. Other references to the Trinity include the three flats in the key signature , like the accompanying fugue. 35. Some key signatures have an enharmonic equivalent that represents a scale identical in sound but spelled differently. 36. Key signatures are everywhere, and the jagged leaps of modernism give way to melodies that really soar.37. The key signature reverts to D major. 38. The above key signatures only express diatonic scales and are therefore sometimes called " standard key signatures ". 39. The above key signatures only express diatonic scales and are therefore sometimes called " standard key signatures ". 40. He wrote most of his songs on the piano and used a wide variety of different key signatures .
