Enable/disable operators

by calling m_pSynthesizer->setOPMask

src/mididevice.cpp

@@ -718,6 +718,11 @@ void CMIDIDevice::HandleSystemExclusive(const uint8_t* pMessage, const size_t nL
     default:
       if(sysex_return >= 300 && sysex_return < 500)
       {
+		uint8_t param = pMessage[4] + ((pMessage[3] & 0x03) * 128);
+        if(param == 155) {
+			LOGDBG("Operators enabled: %d%d%d%d%d%d", (pMessage[5] & 0x20) ? 1 : 0, (pMessage[5] & 0x10) ? 1 : 0, (pMessage[5] & 0x08) ? 1 : 0, (pMessage[5] & 0x04) ? 1 : 0, (pMessage[5] & 0x02) ? 1 : 0, (pMessage[5] & 0x01) ? 1 : 0);
+		    m_pSynthesizer->setOPMask(pMessage[5], nTG);
+		} else {
 			LOGDBG("SysEx voice parameter change: Parameter %d value: %d",pMessage[4] + ((pMessage[3] & 0x03) * 128), pMessage[5]);
 			m_pSynthesizer->setVoiceDataElement(pMessage[4] + ((pMessage[3] & 0x03) * 128), pMessage[5],nTG);
 			switch(pMessage[4] + ((pMessage[3] & 0x03) * 128))
@@ -727,6 +732,7 @@ void CMIDIDevice::HandleSystemExclusive(const uint8_t* pMessage, const size_t nL
 				break;
 			}
      	}
+      }
       else if(sysex_return >= 500 && sysex_return < 600)
       {
         LOGDBG("SysEx send voice %u request",sysex_return-500);