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พอดีผมได้ยินคำสองคำนี้ในบริบทคล้าย ๆ กันเลยเข้าใจว่าคล้าย ๆ กัน ยังไงถ้าเข้าใจผิด ต้องขออภัยด้วยครับ :)
ลองไปค้นมาได้มาดังนี้ครับ
Improvisation
Improvisation is the practice of acting, singing, talking and reacting, of making and creating, in the moment and in response to the stimulus of one's immediate environment and inner feelings. This can result in the invention of new thought patterns, new practices, new structures or symbols, and/or new ways to act. This invention cycle occurs most effectively when the practitioner has a thorough intuitive and technical understanding of the necessary skills and concerns within the improvised domain. Improvisation can be thought of as an "on the spot" or "off the cuff" spontaneous activity.
The skills of improvisation can apply to many different abilities or forms of communication and expression across all artistic, scientific, physical, cognitive, academic, and non-academic disciplines. For example, improvisation can make a significant contribution in music, dance, cooking, presenting a speech, sales, personal or romantic relationships, sports, flower arranging, martial arts, psychotherapy, and much more. Techniques of improvisation are widely trained in the entertainment arts; for example, music, theatre and dance. To "extemporize" or "ad lib" is basically the same as improvising. Colloquial terms such as "let's play it by the ear," "take it as it comes," and "make it up as we go along" are all used to describe "improvisation."
http://en.wikipedia.org/wiki/Improvisation
Ad libitum
As a direction in sheet music, ad libitum indicates that the performer or conductor has one of a variety of types of discretion with respect to a given passage:
to play the passage in free time rather than in strict or "metronomic" tempo (a practice known as rubato when not expressly indicated by the composer);
to improvise a melodic line fitting the general structure prescribed by the passage's written notes or chords;
to omit an instrument part, such as a nonessential accompaniment, for the duration of the passage; or
in the phrase "repeat ad libitum," to play the passage an arbitrary number of times (cf. vamp).
http://en.wikipedia.org/wiki/Ad_libitum
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11 มี.ค. 55 23:17:26
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"ชำแหละ" การแข่งขัน The STAR ค้นฟ้าคว้าดาวปี 8 สัปดาห์ที่ 1 เพลงฮิตในรอบปี โดย ลูกทุ่งคนยาก
