As a music genre, the morna is characterized by having a lento
tempo, a 2-beat
bar (sometimes 4) and in its most traditional form by having a
harmonic structure based on a
cycle of fifths, while the lyrics structure is organized by
musical strophes that alternate with a
refrain. The morna is almost always
monotonic, i.e., it is composed in just one tonality. Compositions that use more than one tonality are rare and generally they are cases of passing from a minor to major tonality or vice versa.
Harmonic structure In its most traditional form, the morna obeys a cycle of fifths. The harmonic progression starts in a
chord (the
tonic) of a certain tonality, the second chord is the lower fifth (the
subdominant), the third chord is the same as the first and the fourth chord is the upper fifth (the
dominant seventh). These chords — tonic, dominant seventh, subdominant — have in Cape Verde the popular names of “primeira”, “segunda” and “terceira” (first, second and third) respectively of the tonality in question. For example, if the music is being performed in an A minor tonality, the A minor chord has the name “primeira de Lá menor” (A minor's first), the E 7th chord has the name of “segunda de Lá menor” (A minor's second) and the D minor chord has the name of “terceira de Lá menor” (A minor's third). However, this structure corresponds to the most basic and most primary harmonic sequence of the morna. First, this structure has been enriched later with the so-called passing chords (see below under
History). Second, this structure is by no means mandatory. Several composers, specially recent composers, employ different chord progressions.
Melodic structure . The
melodic line of the morna varies a lot through the song, with ascending and descending note sequences, and within a bar the notes generally do not have the same length. One frequent characteristic of the morna is the
syncopation, more precisely, one note at the end of a bar is extended to the strong
beat of the next bar. The melody is accentuated on the first beat and the last half-beat of the bar. The melody is structured in verses that in turn are organized in strophes. The main strophes alternate with a refrain strophe, and this alternation can have several models: ABABAB..., ABCBABCB..., ACBACB..., AABCCB..., etc. The melody of the refrain is never the same as the melody of the other strophes.
Themes The theme of the morna is varied, but there are certain subjects that are approached with more frequency. Besides universal subjects like love, typically Cape Verdean subjects are talked about, such as departure abroad, the return, the
saudade, love for the homeland and the sea. One of the great performers responsible for this thematic was the poet/composer
Eugénio Tavares who introduced in the beginning of the 20th century the lyricism and the exploration of typical
romanticism still used today.
Instrumentation The main instrument associated with the morna is the
guitar, popularly called “violão” in Cape Verde. In its most simple form, a guitar is enough to provide the accompaniment for another solo instrument that can be another guitar, a
violin (popularly called “rabeca” in Cape Verde), the singer's voice or any other melodic instrument. The specific way of
strumming the strings in a guitar is popularly called “mãozada” in Cape Verde. The strumming of the morna articulates a
bass (played with the thumb, marking the accentuation of the rhythm) with chords (played with the other fingers, either in an
arpeggio, rhythmically, or in a combination of both). The morna can also be performed on a
piano, with the left hand providing the bass and the accompaniment and the right hand providing the accompaniment and the melody. The composition of a morna band is not rigid. A medium-sized band may have, besides the aforementioned guitar, a
cavaquinho (that plays the chords rhythmically), a ten or
twelve string guitar (popularly called “viola” in Cape Verde, that provides an harmonic support), a solo instrument besides the singer's voice and some percussion instrument. A bigger band may have another guitar, an
acoustic bass guitar, more than one solo instrument (violin,
clarinet,
trumpet, etc.) and several percussion instruments (
shaker,
güiro,
bongos, etc.). From the 1960s, morna began electrification, with the percussion instruments being replaced by a
drum kit and the bass / accompaniment play performed on the guitar replaced by a
bass guitar and an
electric guitar. In the late 1990s, there was a return to the roots with unplugged (acoustic) performances sought after again. In its most traditional form, the song starts with an introduction played on the solo instrument (this introduction generally being the same melody as the refrain) and then the song develops in an alternation between the main strophes and the refrain. Approximately after the middle of the song, instead of the sung refrain, the solo instrument performs an improvisation. Recent composers, however, do not always use this sequence. == As a dance ==