I am in the final stages of building a fully analog synthesizer. Instead of using +10V, GND and -10V, could I switch these voltages to +20V, +10V, and GND to save weight, bulk, and size of a power supply that has to generate -10V? Would a voltage change generally affect audio circuitry or affect output voltage and ruin other audio equipment?
Basically, is it the relationship between voltages or amount of voltage in this case? And what's the best way to create +10V on the board, since the solution in the schematic most likely isn't very efficient?