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Grouping rules

2004-09-17

GWFR1


GWFR2


GWFR3


GWFR4


GWFR5


GPR1

Strongly avoid groups containing a single event.

GPR1, alternative form

Avoid analyses with very small groups -- the smaller, the less preferable.

GPR1 �ϡ��ɤ��������Ȥ��Ȥ����ȡ� �ҤȤĤβ���������ʤ륰�롼�פ���Τ� �򤱤����Ȥ������ȤǤ��͡�
alternative form �Τۤ��ϡ����ξ��򾯤��Ȥ��ơ� ���������롼������Τ� �򤱤����Ȥ������ȤǤ��͡�
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GPR2 (Proximity) ����Ū�ʶᤵ

Consider a sequence of four notes n1, n2, n3, n4.
All else being eaual, the transition n2 - n3 may be heard as a group boundary if

a. (Slur/Rest) the interval of time from the end of n2 to the beginning of n3 is greater than
that from the end of n1 to the beginning of n2 and
that from the end of n3 to the beginning of n4, or if

b. (Attack-Point) the interval of time between the attack points of n2 and n3 is greater than
that between the attack point of n1 and n2 and
that between the attack point of n3 and n4.

GPR2a (Slur/Rest) ���顼/����(��)

GPR2a (Slur/Rest) �ϡ��ɤ��������Ȥ��Ȥ����ȡ�

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GPR2b (Attack-Point) ȯ�����ϻ���

GPR2b (Attack-Point) �ϡ��ɤ��������Ȥ��Ȥ����ȡ�

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GPR3 (Change) �Ѳ�

Consider a sequence of four notes n1, n2, n3, n4.
All else being equal, the transition n2 - n3 may be heard as a group boundary if

a. (Register) the transition n2 - n3 involves a greater intervallic distance than both n1 - n2 and n3 - n4, or if

b. (Dynamics) the transition n2 - n3 involves a change in dynamics and n1 - n2 and n3 - n4 do not, or if

c. (Articulation) the transition n2 - n3 involves a change in articulation and n1 - n2 and n3 - n4 do not, or if

d. (Length) n2 and n3 are of different lengths and both pairs n1, n2 and n3, n4 do not differ in length.


GPR3a (Register) �����Ѳ�

GPR3a (Register) �ϡ��ɤ��������Ȥ��Ȥ����ȡ�

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�Ȥ������Ȥǡ��٤�礦��ĤΥ��٥�Ȥβ��� (�٤�礦��ĤΥ��٥�Ȥβ���κ�) ����Ӥ��ơ�
������Ĥ����������礭����С������ϥ��롼�׶����Ȥ���İ����뤫�⤷��ʤ��衤
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GPR3b (Dynamics) �����Ѳ�

GPR3a (Dynamics) �ϡ��ɤ��������Ȥ��Ȥ����ȡ�

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�Ȥ������Ȥǡ��٤�礦��ĤΥ��٥�Ȥζ��� ����Ӥ��ơ�
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��ʸ�Ǥϡ�p ��f �Ȥ��ä����嵭��ˤĤ����㼨���Ƥ��ꡤ ���οޤˤ���褦�� Velocity �ͤΤ褦���ͤǤ���Ӥ��Ƥ��ʤ��Ǥ��͡�

GPR3c (Articulation)


GPR3d (Length)


GPR4 (Intensification)


GPR5 (Symmetry)


GPR6 (Parallelism)

Where two or more segments of the music can be construed as parallel,
they preferably form parallel parts of groups.

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GPR7 (Time-Span and Prolongational Stability)


Grouping Overlap


Grouping Elision


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