Neat idea!
Not sure the DIP switches was the best solution for swapping modes, but maybe it was the best solution for the least cost engineering wise.
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Soulless 
Interesting idea, but IMHO, you’d be much better off with an ES-8, an iPhone and Audulus. You really have a small computer with a DAC/ADC and a set of programs. The choice of DIP switches to change programs seems like a major PITA to me.
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