Method setPolyMode

include/dsp/midi.hpp:701–706

	}

	void setPolyMode(PolyMode polyMode) {
		if (polyMode == this->polyMode)
			return;
		this->polyMode = polyMode;
		panic();
	}

	float getPitchVoltage(uint8_t channel) {
		uint8_t wheelChannel = (channels > 1 && polyMode == MPE_MODE) ? channel : 0;