Renaissance music is music written in Europe during the Renaissance. Consensus among music historians – with notable dissent – has been to start the era around 1400, with the end of the medieval era, and to close it around 1600, with the beginning of the Baroque period, therefore commencing the musical Renaissance about a hundred years after the beginning of the Renaissance as understood in other disciplines. As in the other arts, the music of the period was significantly influenced by the developments which define the Early Modern period: the rise of humanistic thought; the recovery of the literary and artistic heritage of ancient Greece and Rome; increased innovation and discovery; the growth of commercial enterprise; the rise of a bourgeois class; and the Protestant Reformation. From this changing society emerged a common, unifying musical language, in particular the polyphonic style of the Franco-Flemish school.
The development of printing made distribution of music possible on a wide scale. Demand for music as entertainment and as an activity for educated amateurs increased with the emergence of a bourgeois class. Dissemination of chansons, motets, and masses throughout Europe coincided with the unification of polyphonic practice into the fluid style which culminated in the second half of the sixteenth century in the work of composers such as Palestrina, Lassus, and William Byrd. Relative political stability and prosperity in the Low Countries, along with a flourishing system of music education in the area's many churches and cathedrals, allowed the training of hundreds of singers and composers. These musicians were highly sought throughout Europe, particularly in Italy, where churches and aristocratic courts hired them as composers and teachers. By the end of the 16th century, Italy had absorbed the northern influences, with Venice, Rome, and other cities being centers of musical activity, reversing the situation from a hundred years earlier. Opera arose at this time in Florence as a deliberate attempt to resurrect the music of ancient Greece.
The business terms push and pull originated in logistics and supply chain management, but are also widely used in marketing. Wal-Mart is an example of a company that uses the push vs. pull strategy. A push–pull system in business describes the movement of a product or information between two subjects. On markets the consumers usually "pull" the goods or information they demand for their needs, while the offerers or suppliers "push" them toward the consumers. In logistics chains or supply chains the stages are operating normally both in push- and pull-manner. Push production is based on forecast demand and pull production is based on actual or consumed demand. The interface between these stages is called the push–pull boundary or decoupling point.
A brass instrument is a musical instrument that produces sound by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the player's lips. Brass instruments are also called labrosones, literally meaning "lip-vibrated instruments".
There are several factors involved in producing different pitches on a brass instrument. Slides, valves, crooks, or keys are used to change vibratory length of tubing, thus changing the available harmonic series, while the player's embouchure, lip tension and air flow serve to select the specific harmonic produced from the available series.