Learning by ear first
For most of the Middle Ages, music was passed on mainly by example. A child learned songs by hearing them and repeating them, as children do everywhere. Training for church musicians began early, often with boys in a cathedral or monastery song school, where they memorized the chants used in services. Singers were expected to carry a very large repertory in their heads, and written books served more as a reminder and a reference than as the thing a singer read from during a service.
Memory was a cultivated skill in this period, and music was one of its most practical uses. Teachers developed ways to help: melodies were sorted into families, and singers learned the typical shapes and phrases that recurred within a mode, the pattern of notes that gives a chant its character. Students who knew these patterns could often work out a new melody with less effort.
Writing music down
Notation developed slowly because there was little need for it until repertoires grew too large to remember. The earliest signs, called neumes, were small marks placed above the words of a text, showing roughly where a melody rose and fell. They helped a singer who already knew the tune to recall it, but they did not give exact pitches.
A major step came in the 11th century with the music teacher Guido of Arezzo, who is associated with the use of lines to show pitch and with a method of teaching singers to read new melodies using a sequence of syllables. The exact details of what he did are discussed by scholars, but his name is tied to the idea that a singer could learn a piece from the page rather than only from a teacher. Later developments added ways to show rhythm, which became essential once several voices had to sing together and stay in time. The broader story of musical notation belongs to a longer history of change, but for the art of music-making the key point is that notation gradually turned memory aids into instructions.
Training the minstrel
Professional entertainers followed a different path from church singers. A minstrel or jongleur usually learned from a relative or a master, traveling with him or serving in his household, and picked up a stock of songs, stories and instrumental skills. Repertory was largely built from existing tunes and verses that performers adapted, shortened or extended to suit an audience. In many cases there was no fixed “correct” version of a song.
Some entertainers moved between circuits, such as a lord’s hall in winter and fairs or towns in summer. Skills were valued if they were varied: a player might know several instruments, tell tales and perform tricks. The details of how performers worked are covered elsewhere, but in terms of learning, the main point is that this was an apprenticeship in practice rather than a school.
Composing
The word “composer” can be misleading for the early period. Much music was anonymous, and chant was regarded as part of a shared tradition rather than the property of one author. Over time, individual names began to attach to pieces. Troubadours and trouvères composed both words and melodies, and their songs were attributed to them. In the 14th century, Guillaume de Machaut organized his works into carefully prepared manuscripts, which suggests an author who thought of his music as a body of work to be preserved.
Composers did not always begin with a blank page. A common method was to build new music on top of an existing melody, often a chant, which would be given to one voice while others added lines above and around it. This approach, used in organum and motets, meant that composition was partly a matter of skillful layering. Some of the rules for combining lines came from teachers and treatises, which circulated in universities and schools, where music was studied as one of the seven liberal arts alongside arithmetic, geometry and astronomy. In that setting, music was taught as a branch of mathematics and philosophy, not mainly as performance.
Improvisation
Many players improvised, especially for dancing. A dance tune could be repeated and varied as long as the dancers needed it, and singers adding a second voice to chant sometimes did so on the spot, following conventions rather than written parts. Because improvisation leaves no record, it is easy to underestimate. The written pieces we have are likely only the visible part of a larger practice.
Women and amateurs
Women trained in convents learned the same chant as men, and some noblewomen learned to sing and play instruments at home. Gentlemen and ladies were expected to sing, and a household that wished to appear refined might hire a master to teach children. These domestic settings are poorly documented, but they remind us that music-making was not limited to professionals.
What this means for modern listeners
Because so much depended on memory and practice, a written medieval piece can be a snapshot rather than a final score. Modern performers fill in gaps, which is why recordings vary. The craft they are trying to recover was one of listening, repeating and adapting, with writing slowly gaining importance.