diff --git a/libmscore/accidental.cpp b/libmscore/accidental.cpp
index 71ae4137446e0..0361c8c6ca949 100644
--- a/libmscore/accidental.cpp
+++ b/libmscore/accidental.cpp
@@ -58,6 +58,8 @@ static Acc accList[] = {
     Acc(AccidentalVal::NATURAL, 150,  SymId::accidentalThreeQuarterTonesSharpArrowDown),   // SHARP2_ARROW_DOWN
     Acc(AccidentalVal::NATURAL, -250, SymId::accidentalThreeQuarterTonesFlatArrowUp),      // FLAT2_ARROW_UP
     Acc(AccidentalVal::NATURAL, -150, SymId::accidentalFiveQuarterTonesFlatArrowDown),     // FLAT2_ARROW_DOWN
+    Acc(AccidentalVal::NATURAL,  -50, SymId::accidentalArrowDown),
+    Acc(AccidentalVal::NATURAL,  50,  SymId::accidentalArrowUp),
 
     // Stein-Zimmermann
     Acc(AccidentalVal::NATURAL, -50,  SymId::accidentalQuarterToneFlatStein),   // MIRRORED_FLAT
@@ -125,6 +127,20 @@ static Acc accList[] = {
     Acc(AccidentalVal::NATURAL,    0,    SymId::accidentalQuarterFlatEqualTempered),
     Acc(AccidentalVal::NATURAL,    0,    SymId::accidentalQuarterSharpEqualTempered),
 
+    Acc(AccidentalVal::NATURAL, -6.8,    SymId::accidentalCombiningLower17Schisma),
+    Acc(AccidentalVal::NATURAL,  6.8,    SymId::accidentalCombiningRaise17Schisma),
+    Acc(AccidentalVal::NATURAL, -3.4,    SymId::accidentalCombiningLower19Schisma),
+    Acc(AccidentalVal::NATURAL,  3.4,    SymId::accidentalCombiningRaise19Schisma),
+    Acc(AccidentalVal::NATURAL,-16.5,    SymId::accidentalCombiningLower23Limit29LimitComma),
+    Acc(AccidentalVal::NATURAL, 16.5,    SymId::accidentalCombiningRaise23Limit29LimitComma),
+    Acc(AccidentalVal::NATURAL, -1.7,    SymId::accidentalCombiningLower31Schisma),
+    Acc(AccidentalVal::NATURAL,  1.7,    SymId::accidentalCombiningRaise31Schisma),
+    Acc(AccidentalVal::NATURAL,-10.9,    SymId::accidentalCombiningLower53LimitComma),
+    Acc(AccidentalVal::NATURAL, 10.9,    SymId::accidentalCombiningRaise53LimitComma),
+    //Acc(AccidentalVal::NATURAL,    0,    SymId::accidentalEnharmonicAlmostEqualTo),
+    //Acc(AccidentalVal::NATURAL,    0,    SymId::accidentalEnharmonicEquals),
+    //Acc(AccidentalVal::NATURAL,    0,    SymId::accidentalEnharmonicTilde),
+
     // Persian
     Acc(AccidentalVal::NATURAL, 33,   SymId::accidentalSori),                            // SORI
     Acc(AccidentalVal::NATURAL, -67,  SymId::accidentalKoron),                           // KORON
diff --git a/libmscore/sym.cpp b/libmscore/sym.cpp
index dc8c1aeb225cc..53fc9a0608835 100644
--- a/libmscore/sym.cpp
+++ b/libmscore/sym.cpp
@@ -2968,8 +2968,8 @@ const std::array<const char*, int(SymId::lastSym) + 1> Sym::symUserNames = { {
     "3-comma sharp",
     "4-comma flat",
     "5-comma sharp",
-    "Arrow down (lower by one quarter-tone)",
-    "Arrow up (raise by one quarter-tone)",
+    QT_TRANSLATE_NOOP("symUserNames", "Arrow down (lower by one quarter-tone)"),
+    QT_TRANSLATE_NOOP("symUserNames", "Arrow up (raise by one quarter-tone)"),
     QT_TRANSLATE_NOOP("symUserNames", "Bakiye (flat)"),
     "Bakiye (sharp)",
     "Accidental bracket, left",
@@ -2979,17 +2979,17 @@ const std::array<const char*, int(SymId::lastSym) + 1> Sym::symUserNames = { {
     //QT_TRANSLATE_NOOP("symUserNames", "B\u00fcy\u00fck m\u00fccenneb (sharp)"),
     QT_TRANSLATE_NOOP("symUserNames", "B\u00fcy\u00fck mücenneb (sharp)"),
     "Combining close curly brace",
-    "Combining lower by one 17-limit schisma",
-    "Combining lower by one 19-limit schisma",
-    "Combining lower by one 23-limit comma or 29-limit comma",
-    "Combining lower by one 31-limit schisma",
-    "Combining lower by one 53-limit comma",
+    QT_TRANSLATE_NOOP("symUserNames", "Combining lower by one 17-limit schisma"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining lower by one 19-limit schisma"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining lower by one 23-limit comma or 29-limit comma"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining lower by one 31-limit schisma"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining lower by one 53-limit comma"),
     "Combining open curly brace",
-    "Combining raise by one 17-limit schisma",
-    "Combining raise by one 19-limit schisma",
-    "Combining raise by one 23-limit comma or 29-limit comma",
-    "Combining raise by one 31-limit schisma",
-    "Combining raise by one 53-limit comma",
+    QT_TRANSLATE_NOOP("symUserNames", "Combining raise by one 17-limit schisma)"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining raise by one 19-limit schisma)"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining raise by one 23-limit comma or 29-limit comma"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining raise by one 31-limit schisma"),
+    QT_TRANSLATE_NOOP("symUserNames", "Combining raise by one 53-limit comma"),
     "Syntonic/Didymus comma (80:81) down (Bosanquet)",
     "Syntonic/Didymus comma (80:81) up (Bosanquet)",
     QT_TRANSLATE_NOOP("symUserNames", "Double flat"),
diff --git a/libmscore/types.h b/libmscore/types.h
index 9ce0be7841fae..89d1db40a2a80 100644
--- a/libmscore/types.h
+++ b/libmscore/types.h
@@ -153,7 +153,7 @@ inline uint qHash(const ElementType& key)
 //---------------------------------------------------------
 //   AccidentalType
 //---------------------------------------------------------
-// NOTE: keep this in sync with with accList array
+// NOTE: keep this in sync with with accList array in accidentals.cpp
 
 enum class AccidentalType : char {
     ///.\{
@@ -180,6 +180,8 @@ enum class AccidentalType : char {
     SHARP2_ARROW_DOWN,
     FLAT2_ARROW_UP,
     FLAT2_ARROW_DOWN,
+    ARROW_DOWN,
+    ARROW_UP,
 
     // Stein-Zimmermann
     MIRRORED_FLAT,
@@ -247,6 +249,20 @@ enum class AccidentalType : char {
     QUARTER_FLAT_EQUAL_TEMPERED,
     QUARTER_SHARP_EQUAL_TEMPERED,
 
+    FLAT_17,
+    SHARP_17,
+    FLAT_19,
+    SHARP_19,
+    FLAT_23,
+    SHARP_23,
+    FLAT_31,
+    SHARP_31,
+    FLAT_53,
+    SHARP_53,
+    //EQUALS_ALMOST,
+    //EQUALS,
+    //TILDE,
+
     // Persian
     SORI,
     KORON,