Kalhor, Kayhan

Jazz is an improvisation-centered music tradition that emerged from African American communities in the early 20th century. It blends blues feeling, ragtime syncopation, European harmonic practice, and brass band instrumentation into a flexible, conversational art. Defining features include swing rhythm (a triplet-based pulse), call-and-response phrasing, blue notes, and extended harmonies built on 7ths, 9ths, 11ths, and 13ths. Jazz is as much a way of making music—spontaneous interaction, variation, and personal sound—as it is a set of forms and tunes. Across its history, jazz has continually hybridized, from New Orleans ensembles and big-band swing to bebop, cool and hard bop, modal and free jazz, fusion, and contemporary cross-genre experiments. Its influence permeates global popular and art music.

Persian classical (musiqi-e asil) is the art-music tradition of Iran centered on the modal system called dastgāh and its body of canonical melodies known as the radif. Performances are typically intimate and improvisation-forward, unfolding through a succession of gusheh (short melodic pieces) within a dastgāh, guided by recognizable cadential gestures (forud) and a central tone (shāhed). Its sound world features nuanced microtonal inflections using koron (lowered) and sori (raised) accidentals, fluid rhythmic freedom in avāz (non-metric improvisation), and contrasting metered forms like pishdarāmad, chahārmezrāb, tasnif (song), and reng (dance). Core instruments include tar, setar, kamancheh, santur, ney, and tombak (tonbak), with the human voice employing elaborate ornaments (tahrir). The repertoire draws on classical Persian poetry (Hafez, Rumi, Saadi), creating a contemplative, mystical, and deeply expressive aesthetic.

Persian music refers broadly to the musical traditions of Iran, centered on the radif repertoire and the modal system known as the dastgāh and its related āvāz branches. It is characterized by microtonal intervals (koron and sori accidentals), fluid melodic development through short pieces called gusheh, and a performance practice that balances composition with refined improvisation (bedāheh-navāzi). Typical ensembles feature tar, setar, kamancheh, santur, ney, and frame drums such as tombak and daf, with vocals employing the distinctive ornament called tahrir. Texts often draw on classical Persian poetry (Hafez, Rumi, Saadi), yielding contemplative, romantic, and introspective moods. While the tradition’s roots reach back to pre-Islamic Persia, its courtly and urban forms crystallized from the Safavid era onward and were codified in the Qajar period, continuing to influence regional modal musics across West and Central Asia.