File format for the exchange of resolution-independent, pixel-based (bitmapped) images, intended for very high quality moving image content for theatrical distribution; DPX masters provide the input for film recording (digital images back to film for projection) or D-Cinema digital projection systems.
Most modern pianos have a row of 88 black and white keys (52 white keys for the notes of the C Major scale (the notes C, D, E, F, G, A and B) and 36 shorter black keys, which are raised above the white keys, and set further back on the keyboard.
Black piano keys are called accidentals; these are the sharps and flats of the piano. On the keyboard, there are five black accidentals per octave. A sharp makes a note a half step higher in pitch. A flat makes a note a half step lower in pitch.