## 4pMU7. Rhythmic interpretation of polonaise in piano performances.

### Session: Thursday Afternoon, December 5

### Time: 3:30

**Author: Kimiko Ohta**

**Location: Graduate School of Eng., Osaka Univ., 1-2 Yamadaoka, Suita, 565 Japan**

**Author: Tomoyasu Taguti**

**Location: Konan Univ., Higashinada, 658 Japan**

**Abstract:**

A method for analysis of rhythmic interpretation of a characteristic
rythmic pattern in polonaise is presented. The pattern concerned is one 8th note
followed by two 16th notes. By physical measurement of timing for this pattern
as it appeared in the first beat in several performances of Chopin's polonaise
(Grande Polonaise Op. 22), the duration of this pattern was generally found to
be lengthened considerably. Further, a listening experiment showed that this
portion had a rhythmic stress (of lengthening accent). To characterize the
expressive timing of the pattern, a pair of ratios, P=[a,b] with a=x:1 and
b=1:y, was introduced, where a denotes the ratio of durations of the 8th note to
the sum of two 16th notes, and b the ratio of the two 16th notes. The P's from
the performances by six pianists were plotted in the x-y plane. The result
revealed a clear distinction among individual rhythmic interpretations of the
six pianists, e.g., x<1 and y>1 for the P's of three pianists, which implies
that they put a stress on the second 16th note.

ASA 132nd meeting - Hawaii, December 1996