The perception of certain notes sounding good together is largely influenced by the concept of musical harmony. Harmony is the combination of multiple pitches played simultaneously or in succession, creating chords and chord progressions. The "goodness" or pleasing quality of notes together is subjective and varies across different musical traditions and personal preferences. However, there are a few fundamental principles and concepts that contribute to the perception of notes sounding good together:
Consonance and Dissonance: Consonance refers to the perceived stability and pleasantness of certain combinations of notes, while dissonance refers to the tension and instability created by other combinations. Consonant intervals and chords, such as perfect fifths, major and minor thirds, and major and minor chords, often sound pleasant and harmonious. Dissonant intervals and chords, like tritones or major seconds, create tension and can be resolved to consonant intervals or chords.
Tonal Center or Key: The concept of tonal center or key establishes a reference point within a musical piece. When notes and chords relate to this tonal center, they tend to sound harmonious. Musical compositions often establish a key, such as C major or G minor, and melodies and harmonies are built around the notes within that key.
Scales and Modes: Scales provide a set of notes from which melodies and harmonies are derived. Certain scales, such as the major and minor scales, are widely used in Western music and have established patterns of intervals that create a sense of tonality. Combining notes from the same scale or mode generally results in harmonious combinations.
Chord Progressions: Chord progressions refer to a sequence of chords that form the harmonic backbone of a piece of music. Many chord progressions follow established patterns and relationships between chords, such as the cadences commonly found in classical music or the chord progressions used in popular music genres. These progressions often create a sense of tension and release, contributing to the overall sense of harmony.
Context and Cultural Influence: The perception of harmonious combinations can also be influenced by cultural context and personal exposure to certain musical styles. Different musical traditions and cultures may have unique harmonic systems and preferences. Additionally, personal experiences and cultural exposure can shape individual preferences for certain combinations of notes.
It's important to note that these principles provide a general understanding of what makes notes sound good together, but they are not rigid rules. Music is a creative and expressive art form, and composers and musicians often explore and experiment with unconventional harmonies to achieve unique and interesting sounds.