Prime form is the “most reduced” version of any pc set. The pitch class set class—a term that is very unwieldy, so theorists have agreed to shorten this to the last two words, set class—is the group of groups of pitches that are all related by transposition or inversion. Using the example of Greensleeves provided, the first system is almost identical to the second system. This is called the form of the music. Form Is the Basic Structure. Prime form is the most compact version. We’ve seen similar examples in the intervallic realm. Prime Form Theory Dr. Crist Steps for Finding a Set's Prime Form (1) Identify a pitch segment. Strict Four-Voice Composition, Partimenti, and Schemata, A brief history of basso continuo keyboard-style voice-leading, Tendency tones and functional harmonic dissonances, Generating Roman numerals from a figured bass line, Galant schemas – The Rule of the Octave and Harmonising the Scale with Sequences, Foundational Concepts for Phrase-level Forms, Expansion and Contraction at the Phrase Level, V. Diatonic Harmony, Tonicization, and Modulation, Introduction to Harmony, Cadences, and Phrase Endings, Strengthening Endings with Strong Pre-dominants, Prolonging Tonic at Phrase Beginnings with V6 and Inverted V7s, Performing Harmonic Analysis Using the Phrase Model, Prolongation at Phrase Beginnings using the Leading-tone Chord, La (scale degree 6) in the bass at beginnings, middles, and endings, Mi (scale degree 3) in the bass at beginnings, Diatonic Sequences in Middles (in progress--no examples yet), Extended Tonicization and Modulation to Closely Related Keys, Introduction to Harmonic Schemas in Pop Music, Pitch Class Sets, Normal Order, and Transformations, Analyzing with Modes, Scales, and Collections. The same observation applies in Bartók’s “Subject and Reflection.” The four pitch-class sets in those two passages all have the same intervallic content and that’s why we can label transpositional and inversional relationships between them. The first number refers to the cardinality of the set, and the second number is semi-arbitrary, but generally proceeds from the most compact to the most expanded set. The largest interval class is 6, because if order is disregarded, the tritone is the largest possible interval. Compare the results of steps (2) and (4). Example 1. Most listeners will quickly grasp the form of a short and simple piece, or … 4. Our prime form is (0157). Every piece of music has an overall plan or structure, the “big picture,” so to speak. For this we use parentheses only with no commas. Notation of Notes, Clefs, and Ledger Lines, Half- and Whole-steps, Accidentals, and The Black Keys of the Piano, Major Scales, Scale Degrees, and Key Signatures, Minor Scales, Scale Degrees, and Key Signatures, Introduction to Diatonic Modes and the Chromatic "Scale", The Basics of Sight-singing and Dictation, Roman Numerals and SATB Chord Construction, III. ), Writing Authentic Cadences (TRIADS ONLY! Prime form for each set class is show in parenthesis. These groups of pitch classes are called pitch-class sets. [/footnote], Structure of Individual Sections (Simple vs. Prime form is the version of the set that is transposed to zero and is most compact to the left (compared with its inversion.). Tn and In relationships between passages in “Subject and Reflection.”. Angiosperma is a class of plants that produce flowers. The prime form is the version of the set class that is most compact to the left and transposed to begin on 0. Transpose the set from Step 3 so that the first pitch class is 0. Invert the results from step 2 (any inversion will work) and put the result in normal order. In order for a pitch-class set to be transpositionally or inversionally related to some other pitch class set, they must share the same collection of intervals. (All of the notation that we use for pc sets – unordered, normal, and prime forms – was standardized by Joseph Straus in his Introduction to Post-tonal Theory.) E.g., (012) is a set class. Major and minor triads all sound “the same” in a sense. 3) Invert the original set and repeat steps ½ A group of pitch class sets related by transposition or inversion. Prime form provides an easy shorthand for comparing the interval structure of sets throughout a piece of music. It will always start with 0, and it is used to denote an entire set class –all possible transpositions and inversions of a given pc set. Goal: To identify the prime form for any PC set. Prime form is the version of the set that is transposed to zero and is most compact to the left (compared with its inversion.) All pitch-class sets that are transpositionally and inversionally related belong to the same set class, and they are represented by the same prime form. 3. ), often adjacent to the prime form, was given to each set class by the famous music theorist [Allen Forte], who was one of the first to describe the set class list.
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