An audio signal processing apparatus comprising: a preset setting receiver that is configured to receive setting of a preset that defines a parameter to be copied; a copy-source selecting receiver that is configured to receive a selection of a copy-source channel; a preset selecting receiving processor that is configured to receive a selection of the preset; a copy-destination selecting receiver that is configured to receive a selection of a copy-destination channel; a copy processor that is configured to copy the parameter of the selected preset from the copy-source channel to the copy destination channel; characterized by a plug-in determining portion that is configured to determine whether the setting of the selected preset includes information about a plug-in of the copy-source channel; and a plug-in mounting portion that is configured to mount a corresponding plug-in of the copy-source channel to the copy-destination channel, in a case where the plug-in determining portion determines that the setting of the selected preset includes the information about the plug-in, wherein: the copy processor is configured to copy the parameter of the selected preset to the corresponding plug-in of the copy-destination channel in a case where the plug-in mounting portion mounts the corresponding plug-in of the copy-source channel to the copy-destination channel; the plug-in mounting portion is configured to compare a reproduction system of the copy-source channel and a reproduction system of the copy-destination channel; and the plug-in mounting portion is configured to, in a case where the copy-source channel and the copy-destination channel provide different reproduction systems, mount a plug-in, of the reproduction system of the copy-destination channel, that is a same or similar type as the plug-in of the copy-source channel, the similar type comprising a plug-in manufactured by the same manufacturer, or a plug-in having a same effect name, or a plug-in registered as similar plug-in by a user. a preset setting receiver that is configured to receive setting of a preset that defines a parameter to be copied; a copy-source selecting receiver that is configured to receive a selection of a copy-source channel; a preset selecting receiving processor that is configured to receive a selection of the preset; a copy-destination selecting receiver that is configured to receive a selection of a copy-destination channel; a copy processor that is configured to copy the parameter of the selected preset from the copy-source channel to the copy destination channel; characterized by a plug-in determining portion that is configured to determine whether the setting of the selected preset includes information about a plug-in of the copy-source channel; and a plug-in mounting portion that is configured to mount a corresponding plug-in of the copy-source channel to the copy-destination channel, in a case where the plug-in determining portion determines that the setting of the selected preset includes the information about the plug-in, wherein: the copy processor is configured to copy the parameter of the selected preset to the corresponding plug-in of the copy-destination channel in a case where the plug-in mounting portion mounts the corresponding plug-in of the copy-source channel to the copy-destination channel; the plug-in mounting portion is configured to compare a reproduction system of the copy-source channel and a reproduction system of the copy-destination channel; and the plug-in mounting portion is configured to, in a case where the copy-source channel and the copy-destination channel provide different reproduction systems, mount a plug-in, of the reproduction system of the copy-destination channel, that is a same or similar type as the plug-in of the copy-source channel, the similar type comprising a plug-in manufactured by the same manufacturer, or a plug-in having a same effect name, or a plug-in registered as similar plug-in by a user.