John Playford (1623–1686) was an English publisher and compiler of music. He is best known for his work in the 17th century, particularly for his collections of dance music and instruction manuals. His most notable publication is "The Dancing Master," first published in 1651, which contained a variety of dances and their accompanying tunes, becoming a significant source for the social dance music of the period.

Loring Buzzell is a name associated with a fictional character or a storyline, but there is no widely known or prominent figure by that name in popular culture, literature, or history as of my last update in October 2023. It is possible that Loring Buzzell is a character from a specific book, film, game, or other media that may not be mainstream or widely recognized.

Hypsometric tints, also known as hypsometric coloring, refer to a cartographic technique used in topographic maps to represent elevation levels through color coding. This technique involves applying different colors to various elevation ranges, helping to visually distinguish between different heights above sea level. The colors typically progress from darker tones for lower elevations to lighter tones for higher elevations, or vice versa, depending on the map’s purpose.

There are actually two possible definitions for the DFT:

The $1/\sqrt{N}$ is nicer mathematically as the inverse becomse more symmetric, and power is conserved between time and frequency domains.

Martin Melcher was an American film producer and the husband of actress Doris Day. He was born on June 16, 1920, and passed away on April 20, 1989. Melcher had a significant influence on Doris Day's career, managing her professional life from the late 1950s through the 1960s. Under his management, Day became one of the highest-paid actresses and a major star in Hollywood.

Velvel Pasternak is a notable figure in the field of Jewish music, known primarily for his work as a composer, arranger, and music publisher. He founded the Jewish Music Group and is recognized for his contributions that span various genres of Jewish music, including liturgical and folk music. His efforts have played a significant role in preserving and promoting Jewish musical traditions.

Carl Fischer Music is a prominent music publisher and distributor known for its extensive catalog of sheet music, instructional materials, and musical scores. Founded in 1872, the company has a long history of serving musicians, educators, and ensemble directors across various genres, including classical, jazz, and contemporary music. They offer a wide range of products, including scores for orchestral works, chamber music, band music, choir arrangements, and instrumental methods.

Chappell & Co. could refer to various entities depending on the context, including businesses in different industries or regions. However, without additional information, it is challenging to provide a specific answer. One of the more well-known "Chappell & Co." references is to a British music publishing company that was prominent in the 19th and early 20th centuries. The company was known for publishing a wide range of musical works, including popular songs and sheet music.