## 5pMU5. Extraction of fundamental frequencies from the sound of a violin duet.

### Session: Friday Afternoon, December 6

### Time: 3:00

**Author: Tamotsu Shirado**

**Location: Commun. Res. Lab., M.P.T., Iwaoka, Nisi-ku, Kobe, 651-24 Japan**

**Author: Masuzo Yanagida**

**Location: Doshisha Univ., Kyoto, 610-03 Japan**

**Abstract:**

An algorithm for extracting fundamental frequencies from the sound of a
violin duet is presented. The proposed algorithm is composed of two processes:
(1) framewise enumeration of candidates for fundamental frequencies using the
cepstrum method, and (2) grouping among candidates over its adjacent frames
using a hierarchical clustering method. Process (1) includes a subprocess of
discriminating between the fundamental component of a tone and harmonic
components of the other for duet tones in an octave relation, in particular.
This algorithm differs from most of the traditional methods for extracting
fundamental frequencies in the fact that it introduces loose constraints on
target sounds, but no acoustical model is assumed for the instruments concerned.
Thus the algorithm is expected to be applicable to many more types of musical
instruments than conventional methods. The correct identification rate evaluated
by musical notes was 93% for violin duet sounds in the best case.

ASA 132nd meeting - Hawaii, December 1996