With SonicStage Mastering Studio you can record songs into your computer via an audio device. Not only can you record songs directly from an external player connected to your computer's input terminal, you can also record songs via an external USB audio device compatible with ASIO device. Many external USB audio devices have multiple types of terminals that allow you to record songs from various external players or devices. SonicStage Mastering Studio provides the Standard mode and the DSD mode. The DSD mode enables you to record and output songs precisely without using external effect plug-ins. SonicStage Mastering Studio has various functions, such as to adjust input level (volume) automatically, to start recording at a predetermined input level ("synchro-recording"), and to divide songs automatically, etc. Using these functions allows you to record songs into your computer optimally and simply.