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    1st Element - Length


    opmo

    The OMN language provides for a textual equivalent to the many symbols used in traditional staff notation.
    In the parameter of LENGTH these symbols represent exact durations of virtual time.



    Length Symbols

    l1.png

     

     

    Here are the standard values of note-lengths. The most commonly-used are represented in the OMN language by the first letter of their American arithmetic name, so w is a whole-note, h is a half-note, q is a quarter note and so on.

    Rest Symbols

    l2.png

     

    Here are the standard values of rest-lengths.The most commonly-used are represented in the OMN language by the first letter of their American arithmetic name but with the prefix of a - (minus) sign, so -w is a whole-note rest, -h is a half-note rest, -q is a quarter note rest and so on. To assist with multiple rests -12 will produce 12 bars of whole-note rests.

     

    '(q q q)

    l3.png

     

    Here is a list of three quarter-notes. The list has to begin with a '(a quote) and be enclosed by parentheses ( ).

     

    '(q -e e q)

    l4.png

     

    The example above shows note-lengths and rest-lengths in combination. 
    Length 8 will produce 8 bars of whole-notes lengths.

     

    '(8 h q q)

    l5.png

     

    Length -8 will produce 8 bars of whole-notes rests.

     

    '(-8 h q q)

    l6.png

    Dotted Length


    Symbol:    .  ..  ...
    OMN dots are used the same way as in the standard notation. The maximum dots in OMN length is 3.

     

    '(q...)

    l7.png

    Tuplet


    The OMN system of rhythmical notation is initially constructed on the principle of duple divisions. Here the individual note-lengths stand for their face value. 
    w = (h h)
    h = (q q)
    q = (e e)
    and so on.

     

    The other divisional types must make do by borrowing from this binary series:
    duplet (2), triplet (3), quadruplet (4), quintuplet (5), sextuplet (6), septuplet (7), octuplet (8), nontuplet (9) etc…
    When we write these values we use the same note-values as the immediately preceding binary division.

     

    '((3w 3w 3w) (3h 3h 3h) (3q 3q 3q))

    l8.png

     

    This means for example that a triplet division of the quarter note uses eighth notes.

     

    '((5w = = = =) (5h = = = =) (5q = = = =))

    l9.png

     

    This means for example that a quintuple division of the quarter note uses sixteenth notes.

    Repeat


    Note:     =
    Rest:     -

    '((e. s q =) (e. s q =))

    l10.png

     

    The use of repeat symbols for note-lengths and rest-lengths is fundamental to OMN. Its use can give score scripts a very particular style and appearance. Composers will soon discover different approaches will suit particular situations when writing for percussion or in the notation of repetitive textures.

     

    '((q -e = q) (q - e. t =))

    l11.png

     

    If a note-length repeat  symbol follows a rest-length a note-length is given.

     

    '(s e - s - e. -s e s -e)

    l12.png

     

    The use of the rest-length repeat can bring clarity to the visual layout of a phrase.

    Compound Length


    Length composed of two or more separate length elements:

     

    '(qs s e h)

    l13.png

     

    '(hqs -s qe)

    l14.png

    Tie


    Symbol:    _
    Attribute:    tie (omn form)
    OMN has two types of ties. The first one is a tie length symbol _ and the second one is the attribute tie.

     

    '((h_e e q) (q_3q 3q 3q -h))

    l15.png

     

    The tie symbol is used when a tie is necessary in the middle of a list.

     

    '((h_e c4 e_q tie) (q_3q c4 3q 3q_h))

    l16.png


    The tie as an attribute is necessary when a tie goes across one list to join a length symbol in an adjacent list.

    Extended Length


    Note:     =‌=
    Rest:     --

    '(s =‌= -- = - =‌=‌= - =‌= = --)

    l17.png

    Both note-lengths and rest-lengths can be extended simply by bringing the symbols together in the same way pitches come together to produce chords. In percussion writing this can provide further clarity because only one length value needs to be set at the beginning of the list.

    '(3q =‌= -e = s - = - =‌= --)

    l18.png

    Extended Periodic Length

    '(s=‌= = = = = =)

    l19.png

     

    '(5q=‌= = = 7q=‌=‌= = = =)

    l20.png

     

    '(5q=‌= - = 7q=‌=‌= = - =)

    l21.png

     

    '(s=‌= =‌= -- = - =‌=‌= - =‌= = --)

    l22.png

    Ratios


    OMN notation allows the use of ratio values if more convenient.

     

    '((q = e = h) (q - e. t =))

    l23.png


    same as:

     

    '((1/4 1/4 1/8 1/8 1/2) (1/4 -1/4 3/16 1/32 1/32))

     

    Many functions automatically output ratios as a default rather than OMN symbols. This can usually be changed by setting a keyword within the function such as :omn t.

     

    '((q_e e q) (q -3q = = h))

    l24.png


    same as:

     

    '((1/4_1/8 1/8 1/4) (1/4 -1/12 1/12 1/12 1/2))

     

    The tie mechanism in both its forms works with ratios.

    Examples

    Figure 24 (M. Ravel, Bolero, 1928)

    '((e 3e = = e 3e = = e =)
      (e 3e = = e 3e = = = = =))

    l25.png

     


    Figure 25 (G. Ph. Telemann, 12 Fantasie per clavicembalo TWV 33, n.1, 1732)

    '((s a4 d5 fs4 d5 g4 d5)
      (s a4 d5 fs4 d5 g4 d5)
      (s a4 d5 cs5 b4 a4 g4)
      (s fs4 d4 e4 c4 e d4))

    l26.png

     


    Figure 26 (D. Scarlatti, Sonata B-Dur, 1736)

    '((e e5 3e g5 bb4 g4 e a4)
      (3e a5 c4 a4 e bb4 3e g5 bb4 g4)
      (s a4 c6 c6 a5 a5 f5)
      (s f5 d5 d5 c5 d5 bb5))

    l27.png

     

     

    Figure 27 (F. Chopin, Etudes, Op. 10, No. 5, 1833)

    '((3e gb6 bb6 db6 gb6 eb6 gb6 db6 gb6 bb5 db6 gb5 bb5)
      (3e gb5 bb5 db5 gb5 eb5 gb5 db5 gb5 bb4 db5 gb4 bb4)
      (3e db4 db5 ab4 db5 ab4 ab5 ab4 ab5 eb5 ab5 eb5 eb6)
      (3e eb5 eb6 ab5 eb6 ab5 ab6 ab5 ab6 db6 ab6 db6 db7))

    l28.png

     

     

    Next page 2nd Element - Pitch

    Edited by opmo


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