You can pick up a 24 bit interface used on eBay or even new cheap. M audio is as good a place to start as any. Theres also cheap focusrite interfaces that will have better pre amps.focusrite Scarlett 2 in I suggest. With a used m audio keyboard, as for mixing its not necessary right now for a mixer. Do it in the box. Concentrate on what your putting in and how your getting in and how your hearing it after its in.
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