High Dynamic Range photography is used to create a greater dynamic range with lighter and darker areas in an image. This process is done by adjusting the EV one up or one down.

The tonal range of a digital image is the number of tones it has to describe the dynamic range. These conceptual examples show that an image with a large dynamic range can have a narrow tonal range and an image with a low dynamic image can have a wide tonal range.

Dynamic range refers to the ratio between the quietest and loudest parts of an audio signal. In audio, it typically describes the difference between the softest and loudest sounds a system can reproduce. A wide dynamic range is desirable for capturing and reproducing sound with clarity and detail.

ADPCM

The dynamic range of vinyl is nearly 60dB while cassette tape usually offers around 50-55 dB. Both these analog mediums are inferior to digital offerings such as the CD which has 96dB. However, much of the dynamic range of CDs are completely wasted due to the Loudness Wars and compression.