A system and method is described herein in which an audio source wirelessly transmits audio content to a first audio sink over one wireless link and to a second audio sink over another wireless link. According to the embodiment, upon driving the motor to feed roll paper, the current value supplied to drive the motor is compared with a target value for PWM-control. Contaminated areas are formed in the vicinity of areas where the defects are repaired, measuring first light intensities of the contaminated areas, and second and third light intensities of two sides of the contaminated areas, and calculating ratios of means of the second and third light intensities to the first light intensities to estimate the repair accuracy. A control gate drive section has a plurality of control gate drivers for each of the sector regions. The host luminescent material includes a compound represented by formula ,where n is 0\u02dc8; R2 and R3 respectively represent H, CF3, CN, CH3 or C5H11; R1 is CH3 or one of substituents shown as follows:. The invention further relates to the plants obtained with this method, seeds and progeny of these plants, as well as progeny thereof.