An audio signal processing device comprising: a channel processor having a plurality of channels each of which performs signal processing on an audio signal based on a value of a parameter by channel; a channel strip module having a plurality of channel strips, one channel strip having controls including at least one setting control and one edit button, and the plurality of channel strips being divided into at least two groups comprising a first group and a second group; a channel parameter adjusting means that allocates any of the channels of the channel processor to the respective channel strips of the channel strip module, and adjusts, in accordance with an operation of a control other than the setting control and the edit button of the channel strip, a value of a parameter of a channel allocated to the channel strip; a first display control means for, in accordance with operations of the edit buttons of any two or more channel strips, controlling a predetermined display to display a two or more-channel screen to display respective pluralities of parameters of two or more channels allocated to the two or more channel strips; and a first parameter adjusting means for allocating each of a plurality of parameters of one channel of the two or more channels displayed on the two or more-channel screen to the setting controls of the respective channel strips of the first group of the channel strip module, allocating each of a plurality of parameters of another channel of the two or more channels displayed on the two or more-channel screen to the setting controls of the respective channel strips of the second group of the channel strip module, and adjusting (1005, 1006) values of the parameters allocated to the respective setting controls in accordance with operations on the respective setting controls; characterized in that the audio signal processing device further comprises: a third display control means that, when the two or more-channel screen is displayed on the display, in accordance with an operation of the edit button of any one channel strip other than the two or more channel strips to which the two or more channels displayed on the two or more-channel screen are allocated, controls the display to display a one-channel screen to display a plurality of parameters of one channel allocated to the one channel strip; and a third parameter adjusting means that allocates each of a plurality of parameters for the one channel displayed on the one-channel screen to the setting controls of the respective channel strips of the channel strip module, and adjusts values of the parameters allocated to the respective setting controls in accordance with operations of the respective setting controls. a channel processor having a plurality of channels each of which performs signal processing on an audio signal based on a value of a parameter by channel; a channel strip module having a plurality of channel strips, one channel strip having controls including at least one setting control and one edit button, and the plurality of channel strips being divided into at least two groups comprising a first group and a second group; a channel parameter adjusting means that allocates any of the channels of the channel processor to the respective channel strips of the channel strip module, and adjusts, in accordance with an operation of a control other than the setting control and the edit button of the channel strip, a value of a parameter of a channel allocated to the channel strip; a first display control means for, in accordance with operations of the edit buttons of any two or more channel strips, controlling a predetermined display to display a two or more-channel screen to display respective pluralities of parameters of two or more channels allocated to the two or more channel strips; and a first parameter adjusting means for allocating each of a plurality of parameters of one channel of the two or more channels displayed on the two or more-channel screen to the setting controls of the respective channel strips of the first group of the channel strip module, allocating each of a plurality of parameters of another channel of the two or more channels displayed on the two or more-channel screen to the setting controls of the respective channel strips of the second group of the channel strip module, and adjusting (1005, 1006) values of the parameters allocated to the respective setting controls in accordance with operations on the respective setting controls; a third display control means that, when the two or more-channel screen is displayed on the display, in accordance with an operation of the edit button of any one channel strip other than the two or more channel strips to which the two or more channels displayed on the two or more-channel screen are allocated, controls the display to display a one-channel screen to display a plurality of parameters of one channel allocated to the one channel strip; and a third parameter adjusting means that allocates each of a plurality of parameters for the one channel displayed on the one-channel screen to the setting controls of the respective channel strips of the channel strip module, and adjusts values of the parameters allocated to the respective setting controls in accordance with operations of the respective setting controls.