29. An apparatus according to claim 28, wherein said musical tone signal generating means starts or stops reading performance data in response to manipulation of the phrase select operator.
29. An apparatus according to claim 28, wherein said musical tone signal generating means starts or stops reading performance data in response to manipulation of the phrase select operator. 30. An apparatus according to claim 29, wherein said musical tone signal generating means starts reading the performance data of a previous phrase again from a point of an interruption when same phrase is selected successively.