diff --git a/src/engine/fileOps/it.cpp b/src/engine/fileOps/it.cpp
index facbecaf9..5677dc0cc 100644
--- a/src/engine/fileOps/it.cpp
+++ b/src/engine/fileOps/it.cpp
@@ -1516,6 +1516,26 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
               break;
             case 'S': // special...
               switch (effectVal[chan]>>4) {
+                case 0x3: // vibrato waveform
+                  switch (effectVal[chan]&3) {
+                    case 0x0: // sine
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x00;
+                      break;
+                    case 0x1: // ramp down
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x05;
+                      break;
+                    case 0x2: // square
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x06;
+                      break;
+                    case 0x3: // random
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x07;
+                      break;
+                  }
+                  break;
                 case 0x8: // panning
                   p->data[readRow][effectCol[chan]++]=0x80;
                   p->data[readRow][effectCol[chan]++]=(effectVal[chan]&15)<<4;
diff --git a/src/engine/fileOps/mod.cpp b/src/engine/fileOps/mod.cpp
index 353060bff..44df0a35e 100644
--- a/src/engine/fileOps/mod.cpp
+++ b/src/engine/fileOps/mod.cpp
@@ -356,6 +356,20 @@ bool DivEngine::loadMod(unsigned char* file, size_t len) {
                 case 2: // single note slide down
                   writeFxCol(fxTyp-1+0xf1,fxVal);
                   break;
+                case 0x3: // vibrato waveform
+                  switch (fxVal&3) {
+                    case 0x0: // sine
+                      writeFxCol(0xe3,0x00);
+                      break;
+                    case 0x1: // ramp down
+                      writeFxCol(0xe3,0x05);
+                      break;
+                    case 0x2: // square
+                    case 0x3: 
+                      writeFxCol(0xe3,0x06);
+                      break;
+                  }
+                break;
                 case 9: // retrigger
                   writeFxCol(0x0c,fxVal);
                   break;
diff --git a/src/engine/fileOps/s3m.cpp b/src/engine/fileOps/s3m.cpp
index aacfc4fdf..2aaf6f757 100644
--- a/src/engine/fileOps/s3m.cpp
+++ b/src/engine/fileOps/s3m.cpp
@@ -1101,6 +1101,26 @@ bool DivEngine::loadS3M(unsigned char* file, size_t len) {
               break;
             case 'S': // special...
               switch (effectVal>>4) {
+                case 0x3: // vibrato waveform
+                  switch (effectVal&3) {
+                    case 0x0: // sine
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x00;
+                      break;
+                    case 0x1: // ramp down
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x05;
+                      break;
+                    case 0x2: // square
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x06;
+                      break;
+                    case 0x3: // random
+                      p->data[readRow][effectCol[chan]++]=0xe3;
+                      p->data[readRow][effectCol[chan]++]=0x07;
+                      break;
+                  }
+                  break;
                 case 0x8: // panning
                   p->data[readRow][effectCol[chan]++]=0x80;
                   p->data[readRow][effectCol[chan]++]=(effectVal&15)<<4;
diff --git a/src/engine/fileOps/xm.cpp b/src/engine/fileOps/xm.cpp
index f78973ee8..3e533eb11 100644
--- a/src/engine/fileOps/xm.cpp
+++ b/src/engine/fileOps/xm.cpp
@@ -1147,6 +1147,23 @@ bool DivEngine::loadXM(unsigned char* file, size_t len) {
               case 0xe: // special...
                 // TODO: implement the rest
                 switch (effectVal>>4) {
+                  case 0x3: // vibrato waveform
+                    switch (effectVal&3) {
+                      case 0x0: // sine
+                        p->data[j][effectCol[k]++]=0xe3;
+                        p->data[j][effectCol[k]++]=0x00;
+                        break;
+                      case 0x1: // ramp down
+                        p->data[j][effectCol[k]++]=0xe3;
+                        p->data[j][effectCol[k]++]=0x05;
+                        break;
+                      case 0x2: // square
+                      case 0x3:
+                        p->data[j][effectCol[k]++]=0xe3;
+                        p->data[j][effectCol[k]++]=0x06;
+                        break;
+                    }
+                  break;
                   case 0x5: // fine tune
                     p->data[j][effectCol[k]++]=0xe5;
                     p->data[j][effectCol[k]++]=(effectVal&15)<<4;