Minimalist Plug-In Mantra Box

I’m sourcing a manufacturer-developer who can turn my supplied 3- to 5-minute MP3 tracks into a simple, plug-in mantra chanting box. The look I want is clean and minimalist—no ornate casing, just an unobtrusive unit that blends into any small altar or bedside table... (Budget: ₹600 - ₹1500 INR, Jobs: 3D Design, 3D Modelling, Audio Engineering, CAD / SolidWorks, Electrical Engineering, Manufacturing, Product Design, Prototyping)