The tritone is the interval formed by two notes a distance of six semitones apart, that is, three whole tones. In the twelve-tone equal temperament it occupies the exact centre of the octave and represents the only interval that coincides with its own inversion.
For a general treatment of the tritone in music theory, see the Wikipedia entry: Tritone.
In the symbolic system of Solaria, the tritone assumes a central meaning: it represents the relationship with what is other than oneself, the complementarity of opposites, and the human condition understood as a relationship between self-consciousness and message.
Union and Complementarity of Opposites
Union
The octave symbolises identity: two notes with the same name, separated by twelve semitones, are perceived as the same sound at a different level. The tritone divides this identity into two equal parts. For example, in the octave F–F', the note B is located exactly halfway:
F – B – F'
The distance between F and B is three tones, and the distance between B and the following F is also three tones. For this reason the tritone is the only interval that coincides with its own inversion: F–B and B–F' have the same span.
Since the tritone divides identity into two equivalent parts and, at the same time, shows that each of the two necessarily refers back to the other, it is the symbol of the union of opposites.
Complementarity
In a diatonic context, however, these two intervals indicate different perspectives. F–B and B–F are not simply two alternative names for the same distance, but two opposite ways of traversing it. The first occurs in a Lydian context, characterised by a luminous expansion of the major scale; the second in a Locrian context, marked by unstable and dynamic tension.
For this reason, in the symbolic system of Solaria, the tritone does not merely represent the union of two identical and opposite elements that, when recomposed, form identity, but symbolises above all the dialogue with what is different from oneself: the encounter with another pole that does not eliminate the difference, but makes it a condition of relationship and transformation.
From this standpoint, the tritone is the symbol of the complementarity of opposites: not a fusion that cancels the parts, but a relationship in which difference remains active and becomes generative.
Relationship and Human Identity
Relationship
Every individual represents the other for every other person. For this reason the tritone, in its double condition of identity and otherness, becomes a symbol of the human condition in relation to others.
In this perspective, one of the two notes represents self-consciousness, the capacity to recognise oneself as a subject, to ask questions and to observe the world. The other represents instead the message that every individual constitutes for us: a presence to be interpreted, understood, listened to, welcomed.
The tritone therefore indicates the concrete experience of the encounter between consciousnesses. Every human being is both self-consciousness and message: it looks at the world from within itself, but at the same time appears to others as a sign, a question, a difference, an invitation to understanding.
Identity
To this is added the inner experience of feeling oneself as a union of opposites. The human being is limited, but traversed by infinite desires; it is mortal, but carries within itself a desire for immortality; it is made of flesh and bones, but also of thought, imagination and spirit. In this sense the tritone becomes an image of the fundamental tension of the human: a creature divided and yet unified, suspended between opposing poles that do not cancel each other out, but give form to its identity.
Role in the Symbolic System of Solaria
The tritone appears at several points in the symbolic-musical system of Solaria. In the Sigma Chord, it is the only interval absent from the spatial vector of the chord, and precisely this absence attributes to it the value of an external standpoint in relation to nature — that is, of self-consciousness.
In the relationship between two complementary sigma chords, the tritone becomes instead the principle that connects two opposite polarities of the chromatic total. In this sense it represents not only separation, but also the possibility of completion.
In the passage from the sigma chord to the Pentatonic Scale, finally, the tritone is what is compressed or removed in order to obtain a more consonant structure. This reduction produces stability, but can also generate closure: a consonance that, when separated from the relationship with what is different, becomes opposition.
For these reasons, the tritone is the symbolic place where nature and consciousness, identity and otherness, harmony and dissonance meet.
Related Entries
Sigma Chord
Tritone and the Sigma Chord
Complementary Chord
Pentatonic Scale
Chromatic Total and the Cycle of Fifths
The σεα (sea) System
Zygote Chords
Seven Elements