diff --git a/src/minidexed.cpp b/src/minidexed.cpp
index 72edb6f..80a436f 100644
--- a/src/minidexed.cpp
+++ b/src/minidexed.cpp
@@ -2184,29 +2184,3 @@ unsigned CMiniDexed::getModController (unsigned controller, unsigned parameter,
 	}
 	
 }
-
-void CMiniDexed::setOperatorMask(uint8_t operatorMask, unsigned nTG) {
-    if (nTG >= CConfig::AllToneGenerators) {
-        LOGERR("Invalid tone generator: TG=%u", nTG);
-        return;
-    }
-
-    // According to Yamaha DX7/TX SysEx format:
-    // Bit 0 = OP6, Bit 1 = OP5, Bit 2 = OP4, Bit 3 = OP3, Bit 4 = OP2, Bit 5 = OP1
-    // For MiniDexed: Bit 0 = OP1, Bit 1 = OP2, etc. - need to reverse the bit order to match
-    
-    uint8_t reversedMask = 0;
-    for (int i = 0; i < 6; i++) {
-        if (operatorMask & (1 << i)) {
-            reversedMask |= (1 << (5 - i));
-        }
-    }
-    
-    m_uchOPMask[nTG] = reversedMask;
-    LOGDBG("Set operator mask for TG %u: Yamaha=0x%02X, Reversed=0x%02X", nTG, operatorMask, reversedMask);
-
-    // Apply the updated operator mask to the tone generator
-    if (nTG < m_nToneGenerators) {
-        m_pTG[nTG]->setOPAll(m_uchOPMask[nTG]);
-    }
-}