Liquid discharge apparatus and method of controlling the same

A method of controlling a liquid discharge apparatus including a liquid discharge head including a plurality of nozzles configured to discharge liquid, liquid flow paths communicating individually with respective nozzles, and actuators configured to cause pressure vibration to be generated in liquid in the respective liquid flow paths, the liquid discharge head being configured to discharge liquid from corresponding nozzles by driving the actuators, a filter configured to filter the liquid, a vibration detection mechanism configured to detect vibration of the liquid generated by the driving of the actuators in the liquid flow paths, and a calculation circuit configured to obtain a detection value obtained by the vibration detection mechanism and perform calculation by using the detection value, the method comprising:

• detecting vibration, by the vibration detection mechanism, of n (1<n≦m) nozzles out of m nozzles included in the liquid discharge head;
• and
• determining a state of the filter on the basis of a result of the calculation performed by using the detection value obtained by the vibration detection mechanism.