For a device as sophisticated and elegant as neuma, the logo should also encapsulate its essence. considering that neuma gives you a "sixth sense, " the logo could be a stylized, minimalistic "n" combined with the numeral "6, " perhaps with the 6 subtly wrapping around or interlocking with the "n." this could symbolize the blend of human and technology, becoming an extension of yourself. the design could employ a sleek, metallic sheen or a gradient to represent its high-tech nature, and perhaps a soft glow or halo effect to emphasize its ethereal, almost spiritual, quality of awakening a 'sixth sense.' as neuma is a fusion of the ancient and the cutting-edge, you could use a modern sans-serif font for the "n" but incorporate some classic or even greek-style elements to pay homage to its name's roots.