The most usual scales are the several types of anhemitonic pentatonic (pentatonic without semitones) and diatonic (modal scales or the tonal-functional major and minor modes). Some regions, however, show a preference for other scales that Western theory labelled as “exotic”: “gypsy” scale, hemitonic pentatonic, Ukrainian dorian, ahavoh-ravoh/prhygian dominant, etc. Terminology is far from being unified yet.
The so-called “church” or “greek” modes correspond to diatonic, heptatonic scales with different ending-notes and are employed often (but not only) in old-style folksong repertories. There are two main groups of modal scales: