@lore The Synth master I spoke to recommend an FPGA or custom hardware. They design custom hardware and that's all they will reveal.

The FPGA equivalent to your DSP is somewhere around 30-50 USD. That's a design rated for industrial and automotive use. It comes with built-in DSP functionally in addition to the FPGA functionality.

If the hardware is solid and capable, you might be able to sell a limited amount as a fully configurable synth. Crowdfunding could be an option to offer a wide range of functionality and capability.