RETRACTED: Investigation on the Extraction Methods of Timbre Features in Vocal Singing Based on Machine Learning

Table 1

Timbre samples selected for the experiment.

Instrument category	Number of samples	Voice number
Keyboard instrument	Piano	001
	Celesta	043
Percussion	Timpani	028
	Marimba	098
Stringed instrument	Violin	076
	Cello	122
Wind instrument	Flute	101
	Trumpet	016