The AN Sound Source (Analog Physical Modeling Sound Source) is modeled after analog synthesizers. By selecting from five preset types of multisaw, pulse, oscillator sync, ring modulation, and frequency modulation, the unique oscillator can easily reproduce the tone changes characteristic of analog synthesizers. In addition, LFO, AEG, FEG, and effectors are also included, enabling a variety of sound creation with simple operation. The four models in the "reface" series were newly designed based on the motif of each original design in line with the "high-grade compact" concept. We created numerous prototypes and conducted interviews at evaluation meetings in order to brush up the "texture" of the body surface finish, the feel when turning knobs, the weight of the slider, and other aspects re.