Chart datum, level of water depth on a nautical chart. Datum or datum point, a (possibly arbitrary) reference baseline or point from which scientific measurements are made (from a Latin meaning of datum as a given, i.e. an accepted fact)
Music directors and composers must guide musicians and singers by preparing musical arrangements and helping them achieve the best possible sound. Musical talent. To become a music director or composer, one must have musical talent.
Talent is not enough for most music directors and composers to find employment in this field. They must constantly practice and seek to improve their technique and style. Interpersonal skills. Music directors and composers need to work with agents, musicians, and recording studio personnel. Being friendly, respectful, and open to criticism as well as praise, while enjoying being with others, can help music directors and composers work well with a variety of people. Leadership.