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2. Modulation (music) - Wikipedia

   en.wikipedia.org/wiki/Modulation_(music)

   Key signature change example: C major to C minor. In music, modulation is the change from one tonality (tonic, or tonal center) to another. This may or may not be accompanied by a change in key signature (a key change). Modulations articulate or create the structure or form of many pieces, as well as add interest.

3. Key (music) - Wikipedia

   en.wikipedia.org/wiki/Key_(music)

   Key (music) In music theory, the key of a piece is the group of pitches, or scale, that forms the basis of a musical composition in Western classical music, art music, and pop music. Tonality (from "Tonic") or key: Music which uses the notes of a particular scale is said to be "in the key of" that scale or in the tonality of that scale.

4. Audio time stretching and pitch scaling - Wikipedia

   en.wikipedia.org/wiki/Audio_time_stretching_and...

   Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch. Pitch scaling is the opposite: the process of changing the pitch without affecting the speed. Pitch shift is pitch scaling implemented in an effects unit and intended for live performance. Pitch control is a simpler process which ...

5. Chord progression - Wikipedia

   en.wikipedia.org/wiki/Chord_progression

   In a musical composition, a chord progression or harmonic progression (informally chord changes, used as a plural) is a succession of chords. Chord progressions are the foundation of harmony in Western musical tradition from the common practice era of Classical music to the 21st century. Chord progressions are the foundation of popular music ...

6. Circle of fifths - Wikipedia

   en.wikipedia.org/wiki/Circle_of_fifths

   Circle of fifths showing major and minor keys. In music theory, the circle of fifths (sometimes also cycle of fifths) is a way of organizing pitches as a sequence of perfect fifths. Starting on a C, and using the standard system of tuning for Western music (12-tone equal temperament), the sequence is: C, G, D, A, E, B, F ♯ /G ♭, C ♯ /D ...

7. Piano key frequencies - Wikipedia

   en.wikipedia.org/wiki/Piano_key_frequencies

   Piano key frequencies. This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [ 1 ][ 2 ] Every octave is made of twelve steps called semitones.

8. C-sharp major - Wikipedia

   en.wikipedia.org/wiki/C-sharp_major

   In Hungarian Rhapsody No. 6, Franz Liszt takes the unusual step of changing the key from D-flat major to C-sharp major near the start of the piece, and then back again to B-flat minor. Maurice Ravel selected C-sharp major as the tonic key of "Ondine" from his piano suite Gaspard de la nuit .

9. List of musical symbols - Wikipedia

   en.wikipedia.org/wiki/List_of_musical_symbols

   List of musical symbols. Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections ...