The traditional mode (tab') of sika in Moroccan music has a basic diatonic scale that extends from E to e (E F G A B c d e), although in ascending
melodic movements F# may replace F and in descending melodic movements Bb may replace B. The set of intervals of this mode is therefore quite
different from that of sika/segah in the Mashriq, in which the first degree is flattened by roughly a quarter tone, and several other degrees of the
scale (the 4th, 5th, and 7th) are likewise lowered or raised by some fraction of a tone (although in somewhat different measures in Arab and Turkish
music).
A number of Moroccan modes share the names of modes used in the Mashriq (Rast, Iraq, Hijaz, Ushashaq, Hisar), but they display quite different
intervalic structures and melodic patterns. The Moroccan modes lack the microtonal intervals characteristic of music in the Mashriq and that naturally
creates one key distinction between the two.
The basic scales of Moroccan modes are displayed in La musique classique du Maghreb by Mahmoud Guettat, pp. 265-267. |