In music, the word alteration can mean three things.
As a figure showing the change in the original height of a note, the alteration is placed on the scope, precisely on the line or the spacing of the note it affects, and left.
We distinguish between simple alterations and alterations double, the first being the most common.
They are threefold: the sharp, the flat and natural.
There are two alterations double in modern solfeggio, double sharp and double flat.
For the sake of completeness, mention that there also existed other three alterations double now fallen into disuse because they contain the original B-natural is seen as redundant: double natural, the natural-sharp and natural-flat.
The effect of alteration is different depending on whether it is in the piece - accidental alteration - or to the key - constitutive alteration.
An accidental alteration - referred to simply crash - intervenes in the course of the song, and concerns all the notes of the same name and same height that come after it to the same extent. The effect of accidental alteration is temporary and supersedes any previous alteration affecting the note.
Alteration constitutive is valid throughout the range, for all notes of the same name - same height different this time - except of course if an accident occurs in the meantime changing the height of the note.
While in modern notation, the sign of tampering expresses an absolute height in the musical system, until the XVIIIth century it had value only relative: the most common case, in early music is that of pieces with a flat in the key (the B ), in which a sharp before B designate a B natural - and not B sharp, that makes little sense at this time!
It should be noted also that in these old scores, accidental alteration is generally valid for the note it precedes, and not the entire measure.
An intermediate grade, in every tone of the scale diatonic base, a sound added by an alteration which divides it into two half-tone colors: that is the diatonic scale is chromatic scale, as can be defined as "the diatonic scale magnified by the intermediate notes":
With the development of microtonal music - and, in particular, in quarter-tones - new forms of alterations have been created. However, there is no universally accepted standard.
The quarter-tones are sometimes simply indicated by arrows (up or down), compared to the conventional weathering half-tones. The following chart shows the types of alterations quarter-tone that seem most prevalent today.Alterations in the quarter-tones
But if those corresponding to half-sharp and sharp-and-half seems well accepted, we find, among composers, a greater variety of forms to write the half-flat and flat-and-half.
This form of half-flat seems to be established by usage, since the XXth century, in the notation of maqâmat Arab music.
There are multiple systems of microtonal alterations :
In solfeggio, the chromatic scale refers to a musical scale consisting of seven degrees of the diatonic scale of five notes added intermediaries, each sharing your past two semitones through accidentals.
A diatonic scale is a musical scale called heptatonic, with 7 degrees with 5 tones and 2 half-tones.
This type of scale is the foundation of western music. It is possible, through alterations of the diatonic scale to add a number of intermediate ones, placed near the middle of each tone diatonic. In this case, the scale and amplified, is called chromatic scale. The exact frequency of these intermediate scores can be problematic in agreement: the so-called "equal temperament" simplifies the chromatic scale of reference.
In tonal harmony, modulation refers to a mode change, without interrupting the musical discourse. By extension, it also means:
It is a characteristic of tonal music that can cross different tones successively in the same piece.
To be credible modulation, there must be at least two chords belonging to the new tone: a dominant chord followed by a tonic chord, ie a perfect cadence in the new key. If there is an agreement outside the original tone, there is no modulation, but a simple loan.
The problems posed by the modulation are somewhat similar to those posed by the transposition and are strongly affected by the type of scale used.
In western music, solfeggio (or music theory) is the study of elements to read, write, play or sing a score. The ultimate goal of reading music is to hear a musical work, its orchestration and its interpretation, no other medium that its interior hearing.
In western music, the word means a tone scale music belonging to the tonal system.
A tone is defined as the set of intervals, melodic and harmonic as well, between hierarchical levels of a given scale compared to its fundamental level, called tonic. A tone is characterized by both the tonic and its mode.
Each key is constructed from the diatonic scale.
The tone is also a means to locate a musical instrument in relation to C reference.
The flute, violin or piano are in C, that is to say that when the C is played, it really means to do. The B-flat trumpet sounded really flat so when playing a do. The horn (in F) is heard when playing an F do.
The tone is very important because it will allow transposition and transcription of partitions in C in tones of instruments with different pitches.
Some instruments and their tone:
Nobody gave a comment yet.
Be the first to do so!
The web site
Orchestres / Formations
If you appreciate the work done, you can contribute to the costs by making a donation in the amount of your choice.