organum - 2026 ACF Regionals

Question

Marcel Pérès founded an ensemble named for this style that has also recorded traditional Corsican, Mozarabic, and Ambrosian chant. For 10 points each:

[10h] Name this style of pieces divided into polyphonic purum sections and homophonic discantus sections. Léonin was a composer of this style’s duplum form.

ANSWER: organum [accept Ensemble Organum; accept organum duplum or organum purum]

[10e] Léonin and Pérotin belonged to the Notre Dame school, which employed the rhythmic type of these concepts. Melodic examples of these constructs, such as Lydian, can be derived by starting the major scale on a different note.

ANSWER: modes [accept rhythmic modes; accept Lydian mode; accept melodic mode]

[10m] The rhythmic modes were abandoned by the later ars nova, exemplified by the works of this French composer. This composer wrote the virelai “Douce Dame Jolie” and the Messe de Nostre Dame.

ANSWER: Guillaume de Machaut (“ghee-YOME duh mah-SHOW”)

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Summary


California (North)	Main Site	Y	3	13.33	100%	33%	0%
Canada	Main Site	Y	10	10.00	100%	0%	0%
Florida	Main Site	Y	3	3.33	0%	33%	0%
Great Lakes	Main Site	Y	5	10.00	100%	0%	0%
Midwest	Main Site	Y	8	7.50	75%	0%	0%
Northeast	Main Site	Y	6	15.00	100%	17%	33%
Overflow	Main Site	Y	4	15.00	100%	50%	0%
South Central	Main Site	Y	2	5.00	50%	0%	0%
Southeast	Main Site	Y	7	12.86	86%	29%	14%
UK	Main Site	Y	12	13.33	100%	25%	8%
Upper Mid-Atlantic	Main Site	Y	8	16.25	100%	50%	13%
Upstate NY	Main Site	Y	4	12.50	75%	50%	0%

Data


Stanford B	Berkeley A	0	10	0	10
Berkeley B	Berkeley C	0	10	10	20
Berkeley D	Stanford A	0	10	0	10
McGill A	Brock	0	10	0	10
Toronto G	Carleton University	0	10	0	10
Guelph	Western A	0	10	0	10
Waterloo B	McGill B	0	10	0	10
Western C	McMaster A	0	10	0	10
Ottawa	McMaster B	0	10	0	10
Queen's	Toronto Metropolitan	0	10	0	10
Toronto E	Toronto B	0	10	0	10
Toronto C	UBC B	0	10	0	10
Simon Fraser	Western B	0	10	0	10
Central Florida A	Central Florida B	0	0	10	10
Florida A	Central Florida C	0	0	0	0
Florida C	Florida B	0	0	0	0
CWRU A	Ohio State A	0	10	0	10
Michigan A	CWRU B	0	10	0	10
Ohio State B	Michigan B	0	10	0	10
Michigan State	Michigan C	0	10	0	10
Ohio State C	Pittsburgh	0	10	0	10
Purdue B	Chicago A	0	10	0	10
Chicago B	Purdue A	0	10	0	10
Chicago C	Northwestern B	0	10	0	10
Chicago D	Illinois A	0	10	0	10
Illinois B	Illinois C	0	10	0	10
Notre Dame B	Indiana C	0	0	0	0
Indiana A	Northwestern C	0	10	0	10
Indiana B	Notre Dame A	0	0	0	0
Dartmouth A	Bowdoin A	10	10	0	20
Brandeis B	Bowdoin B	0	10	0	10
Harvard B	Brown	0	10	0	10
Harvard A	Dartmouth B	0	10	0	10
MIT	Southern Connecticut State	10	10	10	30
Yale	Brandeis A	0	10	0	10
Georgia Tech A	Claremont	0	10	10	20
Iowa State	Washington B	0	10	0	10
Missouri A	Carleton College	0	10	10	20
Missouri B	Washington A	0	10	0	10
Texas A	Murray State A	0	10	0	10
Texas A&M A	Texas B	0	0	0	0
Georgia Tech B	Alabama A	0	10	10	20
Georgia Tech D	Bruin	0	10	0	10
Alabama B	Georgia Tech C	0	10	0	10
Tennessee B	Mississipi State	0	0	0	0
Louisville B	Sewanee	10	10	10	30
WashU A	Tennessee A	0	10	0	10
Kentucky	Vanderbilt B	0	10	0	10
Bristol	Oxford A	0	10	10	20
Cambridge C	Imperial C	0	10	10	20
Cardiff	Southampton A	0	10	0	10
Oxford B	City St. George's	0	10	0	10
Imperial A	Durham	0	10	0	10
Oxford C	Edinburgh A	0	10	0	10
LSE	Edinburgh B	0	10	0	10
Montpellier	Manchester	0	10	0	10
Imperial B	Southampton B	0	10	0	10
UCL	Cambridge B	0	10	0	10
Birmingham	Warwick A	0	10	0	10
Cambridge A	Warwick B	10	10	10	30
Vassar	Columbia A	0	10	0	10
Georgetown	Maryland C	0	10	10	20
NYU A	Johns Hopkins B	0	10	10	20
NYU B	Catholic	0	10	10	20
NYU C	Swarthmore	0	10	0	10
Cornell A	Binghamton B	0	10	10	20
Binghamton A	Cornell C	0	0	0	0
Cornell B	RIT	0	10	0	10
Penn State	Rochester	0	10	10	20
John Jay	Maryland B	0	10	0	10
Johns Hopkins A	Columbia B	10	10	0	20
Columbia C	Maryland A	0	10	10	20