ACOUSTIC DEVICE

PROBLEM TO BE SOLVED: To prevent the occurrence of howling even if an excessive sound volume is set at first by individually setting a musical instrument volume, a singing voice volume and a mixing volume, adjusting them and resetting each volume in outputting them to a sound field. SOLUTION: A volume set value which individually sets an effect volume, mixing sound volume, a music sound volume or the like is read by a reading part 21, an optimal volume set value which does not generate howling is calculated from this read volume set value and a limited value of each volume stored in a limited value storage part 23 at a calculation part 22 and is outputted to a control part 24. The control part 24 adjusts a first volume set value by this optimal volume set value. In this way, when the first set volume is adjusted and outputted to an acoustic room of a sound field, the first set volume is reset and adjusted. Thus, it becomes possible to set an optimal volume, to appropriately prevent howling from being generated and to have comfort improved by resetting in this way.