A control device is provided which mixes and records two types of audio signals processed under standards different from each other; in particular, an audio signal of ASIO standard and an audio signal of WDM standard. An audio interface is connected to a computer, and an audio signal is input to the computer. A mixer module of the computer mixes an audio signal which is effect-processed by an ASIO application and an audio signal reproduced by a WDM application, and outputs the mixed audio signal to the audio interface and to the WDM application for sound recording. The user operates a screen displayed on an operation panel to switch between presence and absence of effect process and presence and absence of mixing.