Actuator drive circuit of liquid discharge apparatus and print control apparatus

An actuator drive circuit for a liquid discharge apparatus, comprising:

• a discharge waveform generating circuit configured to generate a plurality of drive waveforms to be applied to an actuator, the plurality of drive waveforms corresponding to a plurality of gradation values of gradation scale data;
• a sleep waveform generating circuit configured to generate a sleep waveform to be applied to the actuator, the sleep waveform causing a voltage of the actuator to transition to a first voltage without liquid discharge from a nozzle associated with the actuator, the sleep waveform corresponding to a first gradation value that is different from any of the plurality of gradation values corresponding to the plurality of drive waveforms;
• a wake waveform generating circuit configured to generate a wake waveform to be applied to the actuator, the wake waveform causing the voltage of the actuator to transition to a second voltage higher than the first voltage without liquid discharge from the nozzle, the wake waveform corresponding to a second gradation value that is different from any of the plurality of gradation values corresponding to the plurality of drive waveforms and the first gradation value;
• and
• a bias hold waveform generating circuit configured to generate a bias hold waveform, the bias hold waveform causing a voltage of the actuator to be maintained at a third voltage, the third voltage being equal to the second voltage.