murchana

The term "murchana" in Indian classical music refers to a specific type of scale or mode. These murchanas are seven-note series that form the basis for melodic frameworks used in improvisation and composition.12

In ancient Indian music theory, murchanas were derived from two parent scales, sadjagrama and madhyamagrama. These scales, and the murchanas derived from them, were thought to evoke particular sentiments or moods (rasa). The system involved a precise measurement of intervals using units called shruti, with the octave comprising 22 shrutis. The positioning of notes within these scales and the relationships between them were crucial for defining the character of the music.1

While murchanas are foundational to understanding ancient Indian music theory, the concept of raga is more central to contemporary classical music. A raga is a melodic framework that provides a scale, typical note order, and characteristic motifs for improvisation, aiming to create a unique mood.2