diff --git a/papers/export-tech.md b/papers/export-tech.md
index 6e074b286..7c12dee22 100644
--- a/papers/export-tech.md
+++ b/papers/export-tech.md
@@ -28,8 +28,9 @@ size | description
  ??? | channel data
 ```
 
-read command and values (if any).
-the list of commands follows.
+program follows.
+
+### commands/instructions
 
 ```
 hex | description
@@ -47,7 +48,6 @@ hex | description
  b6 | note off env
  b7 | env release
  b8 | instrument // (ins, force)
- be | panning // (left, right)
  c0 | pre porta // (inporta, isportaorslide)
  c2 | vibrato // (speed, depth)
  c3 | vibrato range // (range)
@@ -55,9 +55,14 @@ hex | description
  c5 | pitch // (pitch)
  c6 | arpeggio // (note1, note2)
  c7 | volume // (vol)
- c8 | vol slide // (amount, onetick)
+ c8 | vol slide // (amount)
  c9 | porta // (target, speed)
  ca | legato // (note)
+ cb | volume slide with target // (amount, target)
+ cc | tremolo // (speed/depth)
+ cd | panbrello // (speed/depth)
+ ce | pan slide // (speed)
+ cf | panning // (left, right)
 ----|------------------------------------
  d0 | speed dial command 0
  d1 | speed dial command 1
@@ -71,13 +76,13 @@ hex | description
 ----|------------------------------------
  f0 | UNUSED - placeholder used during optimization passes (3-byte nonce follows)
  f1 | no operation
- f2 | UNUSED - unoptimized extended command
+ f2 | UNUSED
  f3 | loop (negative offset and count follow... both are 8-bit)
- f4 | call symbol (32-bit index follows; only used internally)
- f5 | jump to sub-block (address follows)
- f6 | go to sub-block (32-bit offset follows)
+ f4 | UNUSED - call symbol (32-bit index follows; only used internally)
+ f5 | call sub-block (32-bit address follows)
+ f6 | UNUSED
  f7 | full command (command and data follows)
- f8 | go to sub-block (16-bit offset follows)
+ f8 | call sub-block (16-bit address follows)
  f9 | return from sub-block
  fa | jump (address follows)
  fb | set tick rate (4 bytes)
@@ -87,3 +92,8 @@ hex | description
  ff | stop
 ```
 
+## full commands
+
+```
+
+```
\ No newline at end of file
diff --git a/src/engine/cmdStream.cpp b/src/engine/cmdStream.cpp
index 7e24c7d42..f948a1ae7 100644
--- a/src/engine/cmdStream.cpp
+++ b/src/engine/cmdStream.cpp
@@ -117,6 +117,8 @@ bool DivCSPlayer::tick() {
         case 0xb8: case 0xbe: case 0xc0: case 0xc2:
         case 0xc3: case 0xc4: case 0xc5: case 0xc6:
         case 0xc7: case 0xc8: case 0xc9: case 0xca:
+        case 0xcb: case 0xcc: case 0xcd: case 0xce:
+        case 0xcf:
           command=next-0xb4;
           break;
         case 0xf0: // placeholder
@@ -147,19 +149,11 @@ bool DivCSPlayer::tick() {
           command=stream.readC();
           break;
         case 0xf8: {
-          unsigned int callAddr=chan[i].readPos+2+stream.readS();
+          unsigned int callAddr=(unsigned short)stream.readS();
           chan[i].readPos=stream.tell();
           if (!chan[i].doCall(callAddr)) {
-            logE("%d: (callb16) stack error!",i);
-          }
-          mustTell=false;
-          break;
-        }
-        case 0xf6: {
-          unsigned int callAddr=chan[i].readPos+4+stream.readI();
-          chan[i].readPos=stream.tell();
-          if (!chan[i].doCall(callAddr)) {
-            logE("%d: (callb32) stack error!",i);
+            logE("%d: (call) stack error!",i);
+            chan[i].readPos=0;
           }
           mustTell=false;
           break;
@@ -168,7 +162,8 @@ bool DivCSPlayer::tick() {
           unsigned int callAddr=stream.readI();
           chan[i].readPos=stream.tell();
           if (!chan[i].doCall(callAddr)) {
-            logE("%d: (call) stack error!",i);
+            logE("%d: (calli) stack error!",i);
+            chan[i].readPos=0;
           }
           mustTell=false;
           break;
@@ -208,9 +203,9 @@ bool DivCSPlayer::tick() {
           chan[i].lastWaitLen=chan[i].waitTicks;
           break;
         case 0xff:
-          chan[i].readPos=chan[i].startPos;
+          chan[i].readPos=0;
           mustTell=false;
-          logI("%d: stop go back to %x",i,chan[i].readPos);
+          logI("%d: stop",i,chan[i].readPos);
           break;
         default:
           logE("%d: illegal instruction $%.2x! $%.x",i,next,chan[i].readPos);
@@ -240,7 +235,7 @@ bool DivCSPlayer::tick() {
             arg0=(signed char)stream.readC();
             arg1=(unsigned char)stream.readC();
             break;
-          case DIV_CMD_PANNING:
+          case DIV_CMD_HINT_PANNING: // TODO: panbrello
             arg0=(unsigned char)stream.readC();
             arg1=(unsigned char)stream.readC();
             break;
@@ -391,6 +386,9 @@ bool DivCSPlayer::tick() {
           case DIV_CMD_HINT_ARP_TIME:
             arpSpeed=arg0;
             break;
+          case DIV_CMD_HINT_PANNING:
+            e->dispatchCmd(DivCommand(DIV_CMD_PANNING,i,arg0,arg1));
+            break;
           default: // dispatch it
             e->dispatchCmd(DivCommand((DivDispatchCmds)command,i,arg0,arg1));
             break;
diff --git a/src/engine/cmdStreamOps.cpp b/src/engine/cmdStreamOps.cpp
index 04c5c1858..fed85115a 100644
--- a/src/engine/cmdStreamOps.cpp
+++ b/src/engine/cmdStreamOps.cpp
@@ -34,7 +34,7 @@ int DivCS::getInsLength(unsigned char ins, unsigned char ext) {
     case 0xca: // legato
     case 0xfd: // waitc
       return 2;
-    case 0xbe: // pan
+    case 0xcf: // pan
     case 0xc2: // vibrato
     case 0xc6: // arpeggio
     case 0xc8: // vol slide
@@ -48,20 +48,19 @@ int DivCS::getInsLength(unsigned char ins, unsigned char ext) {
       return 0;
     case 0xf0: // opt
       return 4;
-    case 0xf2: // opt command
     case 0xf7: { // cmd
       // determine length from secondary
       if (ext==0) return 0;
       return 0;
     }
-    case 0xf8: // callb16
+    case 0xf8: // call
     case 0xfc: // waits
       return 3;
     case 0xf4: // callsym
-    case 0xf5: // call
-    case 0xf6: // callb32
+    case 0xf5: // calli
     case 0xfa: // jmp
     case 0xfb: // rate
+    case 0xcb: // volporta
       return 5;
   }
   return 1;
@@ -80,7 +79,6 @@ void writePackedCommandValues(SafeWriter* w, const DivCommand& c) {
     case DIV_CMD_NOTE_OFF_ENV:
     case DIV_CMD_ENV_RELEASE:
     case DIV_CMD_INSTRUMENT:
-    case DIV_CMD_PANNING:
     case DIV_CMD_PRE_PORTA:
     case DIV_CMD_HINT_VIBRATO:
     case DIV_CMD_HINT_VIBRATO_RANGE:
@@ -92,11 +90,15 @@ void writePackedCommandValues(SafeWriter* w, const DivCommand& c) {
     case DIV_CMD_HINT_VOL_SLIDE:
     case DIV_CMD_HINT_VOL_SLIDE_TARGET:
     case DIV_CMD_HINT_LEGATO:
+    case DIV_CMD_HINT_TREMOLO:
+    case DIV_CMD_HINT_PANBRELLO:
+    case DIV_CMD_HINT_PAN_SLIDE:
+    case DIV_CMD_HINT_PANNING:
       w->writeC((unsigned char)c.cmd+0xb4);
       break;
     default:
-      return; // quit for now... we'll implement this later
-      w->writeC(0xf2); // unoptimized extended command
+      return;
+      w->writeC(0xf7);
       w->writeC(c.cmd);
       break;
   }
@@ -118,9 +120,12 @@ void writePackedCommandValues(SafeWriter* w, const DivCommand& c) {
     case DIV_CMD_HINT_VIBRATO_SHAPE:
     case DIV_CMD_HINT_PITCH:
     case DIV_CMD_HINT_VOLUME:
+    case DIV_CMD_HINT_TREMOLO:
+    case DIV_CMD_HINT_PANBRELLO:
+    case DIV_CMD_HINT_PAN_SLIDE:
       w->writeC(c.value);
       break;
-    case DIV_CMD_PANNING:
+    case DIV_CMD_HINT_PANNING:
     case DIV_CMD_HINT_VIBRATO:
     case DIV_CMD_HINT_ARPEGGIO:
     case DIV_CMD_HINT_PORTA:
@@ -536,15 +541,11 @@ SafeWriter* DivEngine::saveCommand() {
       switch (i.cmd) {
         // strip away hinted/useless commands
         case DIV_CMD_GET_VOLUME:
-          break;
         case DIV_CMD_VOLUME:
-          break;
+        case DIV_CMD_PANNING:
         case DIV_CMD_NOTE_PORTA:
-          break;
         case DIV_CMD_LEGATO:
-          break;
         case DIV_CMD_PITCH:
-          break;
         case DIV_CMD_PRE_NOTE:
           break;
         default:
@@ -808,119 +809,6 @@ SafeWriter* DivEngine::saveCommand() {
     sortPos++;
   }*/
 
-  /*
-  for (int i=0; i<chans; i++) {
-    // optimize stream
-    SafeWriter* oldStream=chanStream[i];
-    SafeReader* reader=oldStream->toReader();
-    chanStream[i]=new SafeWriter;
-    chanStream[i]->init();
-
-    while (1) {
-      try {
-        unsigned char next=reader->readC();
-        switch (next) {
-          case 0xb8: // instrument
-          case 0xc0: // pre porta
-          case 0xc3: // vibrato range
-          case 0xc4: // vibrato shape
-          case 0xc5: // pitch
-          case 0xc7: // volume
-          case 0xca: // legato
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            break;
-          case 0xbe: // panning
-          case 0xc2: // vibrato
-          case 0xc6: // arpeggio
-          case 0xc8: // vol slide
-          case 0xc9: // porta
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            break;
-          case 0xf2: { // full command (pre)
-            unsigned char cmd=reader->readC();
-            bool foundShort=false;
-            for (int j=0; j<16; j++) {
-              if (sortedCmd[j]==cmd) {
-                chanStream[i]->writeC(0xd0+j);
-                foundShort=true;
-                break;
-              }
-            }
-            if (!foundShort) {
-              chanStream[i]->writeC(0xf7); // full command
-              chanStream[i]->writeC(cmd);
-            }
-
-            unsigned char cmdLen=reader->readC();
-            logD("cmdLen: %d",cmdLen);
-            for (unsigned char j=0; j<cmdLen; j++) {
-              next=reader->readC();
-              chanStream[i]->writeC(next);
-            }
-            break;
-          }
-          case 0xfb: // tick rate
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            next=reader->readC();
-            chanStream[i]->writeC(next);
-            break;
-          case 0xfc: { // 16-bit wait
-            unsigned short delay=reader->readS();
-            bool foundShort=false;
-            for (int j=0; j<16; j++) {
-              if (sortedDelay[j]==delay) {
-                chanStream[i]->writeC(0xe0+j);
-                foundShort=true;
-                break;
-              }
-            }
-            if (!foundShort) {
-              chanStream[i]->writeC(next);
-              chanStream[i]->writeS(delay);
-            }
-            break;
-          }
-          case 0xfd: { // 8-bit wait
-            unsigned char delay=reader->readC();
-            bool foundShort=false;
-            for (int j=0; j<16; j++) {
-              if (sortedDelay[j]==delay) {
-                chanStream[i]->writeC(0xe0+j);
-                foundShort=true;
-                break;
-              }
-            }
-            if (!foundShort) {
-              chanStream[i]->writeC(next);
-              chanStream[i]->writeC(delay);
-            }
-            break;
-          }
-          default:
-            chanStream[i]->writeC(next);
-            break;
-        }
-      } catch (EndOfFileException& e) {
-        break;
-      }
-    }
-
-    oldStream->finish();
-    delete oldStream;
-  }*/
-
   // write results
   for (int i=0; i<chans; i++) {
     chanStreamOff[i]=w->tell();
diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index aa4c1cff8..7289767eb 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -71,6 +71,10 @@ enum DivDispatchCmds {
   DIV_CMD_HINT_PORTA, // (target, speed)
   DIV_CMD_HINT_LEGATO, // (note)
   DIV_CMD_HINT_VOL_SLIDE_TARGET, // (amount, target)
+  DIV_CMD_HINT_TREMOLO, // (speed/depth as a byte)
+  DIV_CMD_HINT_PANBRELLO, // (speed/depth as a byte)
+  DIV_CMD_HINT_PAN_SLIDE, // (speed)
+  DIV_CMD_HINT_PANNING, // (left, right)
 
   DIV_CMD_SAMPLE_MODE, // (enabled)
   DIV_CMD_SAMPLE_FREQ, // (frequency)
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 8023851b1..cebd9846b 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -68,6 +68,10 @@ const char* cmdName[]={
   "HINT_PORTA",
   "HINT_LEGATO",
   "HINT_VOL_SLIDE_TARGET",
+  "HINT_TREMOLO",
+  "HINT_PANBRELLO",
+  "HINT_PAN_SLIDE",
+  "HINT_PANNING",
 
   "SAMPLE_MODE",
   "SAMPLE_FREQ",
@@ -764,6 +768,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
         } else {
           chan[i].panSpeed=0;
         }
+        dispatchCmd(DivCommand(DIV_CMD_HINT_PAN_SLIDE,i,chan[i].panSpeed&0xff));
         break;
       case 0x84: // panbrello
         if (chan[i].panDepth==0) {
@@ -774,6 +779,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
         if (chan[i].panDepth!=0) {
           chan[i].panSpeed=0;
         }
+        dispatchCmd(DivCommand(DIV_CMD_HINT_PANBRELLO,i,effectVal));
         break;
       case 0x88: // panning rear (split 4-bit)
         chan[i].panRL=(effectVal>>4)|(effectVal&0xf0);
@@ -941,6 +947,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
         }
         chan[i].tremoloDepth=effectVal&15;
         chan[i].tremoloRate=effectVal>>4;
+        dispatchCmd(DivCommand(DIV_CMD_HINT_TREMOLO,i,effectVal));
         if (chan[i].tremoloDepth!=0) {
           chan[i].volSpeed=0;
           chan[i].volSpeedTarget=-1;
@@ -1229,6 +1236,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
 
   if (panChanged) {
     dispatchCmd(DivCommand(DIV_CMD_PANNING,i,chan[i].panL,chan[i].panR));
+    dispatchCmd(DivCommand(DIV_CMD_HINT_PANNING,i,chan[i].panL,chan[i].panR));
   }
   if (surroundPanChanged) {
     dispatchCmd(DivCommand(DIV_CMD_SURROUND_PANNING,i,2,chan[i].panRL));
diff --git a/src/gui/csPlayer.cpp b/src/gui/csPlayer.cpp
index d0a46533b..842fc1ac0 100644
--- a/src/gui/csPlayer.cpp
+++ b/src/gui/csPlayer.cpp
@@ -44,10 +44,6 @@ String disasmCmd(unsigned char* buf, size_t bufLen, unsigned int addr) {
       if (addr+1>=bufLen) return "???";
       return fmt::sprintf("ins $%.2x",(int)buf[addr+1]);
       break;
-    case 0xbe:
-      if (addr+2>=bufLen) return "???";
-      return fmt::sprintf("pan $%x, $%x",(int)buf[addr+1],(int)buf[addr+2]);
-      break;
     case 0xc0:
       if (addr+1>=bufLen) return "???";
       return fmt::sprintf("preporta $%.2x",(int)buf[addr+1]);
@@ -88,6 +84,26 @@ String disasmCmd(unsigned char* buf, size_t bufLen, unsigned int addr) {
       if (addr+1>=bufLen) return "???";
       return fmt::sprintf("legato %d",(int)buf[addr+1]);
       break;
+    case 0xcb:
+      if (addr+4>=bufLen) return "???";
+      return fmt::sprintf("volporta %d, %d",(int)((short)(buf[addr+1]|(buf[addr+2]<<8))),(int)((short)(buf[addr+3]|(buf[addr+4]<<8))));
+      break;
+    case 0xcc:
+      if (addr+1>=bufLen) return "???";
+      return fmt::sprintf("tremolo $%.2x",(int)buf[addr+1]);
+      break;
+    case 0xcd:
+      if (addr+1>=bufLen) return "???";
+      return fmt::sprintf("panbrello $%.2x",(int)buf[addr+1]);
+      break;
+    case 0xce:
+      if (addr+1>=bufLen) return "???";
+      return fmt::sprintf("panslide %d",(signed char)buf[addr+1]);
+      break;
+    case 0xcf:
+      if (addr+2>=bufLen) return "???";
+      return fmt::sprintf("pan $%x, $%x",(int)buf[addr+1],(int)buf[addr+2]);
+      break;
     case 0xe0: case 0xe1: case 0xe2: case 0xe3:
     case 0xe4: case 0xe5: case 0xe6: case 0xe7:
     case 0xe8: case 0xe9: case 0xea: case 0xeb:
@@ -112,16 +128,12 @@ String disasmCmd(unsigned char* buf, size_t bufLen, unsigned int addr) {
       if (addr+4>=bufLen) return "???";
       return fmt::sprintf("call %.8x",(unsigned int)(buf[addr+1]|(buf[addr+2]<<8)|(buf[addr+3]<<16)|(buf[addr+4]<<24)));
       break;
-    case 0xf6:
-      if (addr+4>=bufLen) return "???";
-      return fmt::sprintf("callb32 %.8x",(unsigned int)(buf[addr+1]|(buf[addr+2]<<8)|(buf[addr+3]<<16)|(buf[addr+4]<<24)));
-      break;
     case 0xf7:
       return "CMD";
       break;
     case 0xf8:
       if (addr+2>=bufLen) return "???";
-      return fmt::sprintf("callb16 %.4x",(int)(buf[addr+1]|(buf[addr+2]<<8)));
+      return fmt::sprintf("call %.4x",(unsigned int)(buf[addr+1]|(buf[addr+2]<<8)));
       break;
     case 0xf9:
       return "ret";