diff --git a/src/sfizz/PolyphonyGroup.cpp b/src/sfizz/PolyphonyGroup.cpp
index d5b1615c..18b7a34f 100644
--- a/src/sfizz/PolyphonyGroup.cpp
+++ b/src/sfizz/PolyphonyGroup.cpp
@@ -17,6 +17,11 @@ void sfz::PolyphonyGroup::removeVoice(const Voice* voice) noexcept
     swapAndPopFirst(voices, [voice](const Voice* v) { return v == voice; });
 }
 
+void sfz::PolyphonyGroup::removeAllVoices() noexcept
+{
+    voices.clear();
+}
+
 unsigned sfz::PolyphonyGroup::numPlayingVoices() const noexcept
 {
     return absl::c_count_if(voices, [](const Voice* v) {
diff --git a/src/sfizz/PolyphonyGroup.h b/src/sfizz/PolyphonyGroup.h
index f3d47257..6a87d05f 100644
--- a/src/sfizz/PolyphonyGroup.h
+++ b/src/sfizz/PolyphonyGroup.h
@@ -35,6 +35,10 @@ public:
      * @param voice
      */
     void removeVoice(const Voice* voice) noexcept;
+    /**
+     * @brief Remove all the voices from this polyphony group.
+     */
+    void removeAllVoices() noexcept;
     /**
      * @brief Get the polyphony limit for this group
      *
diff --git a/src/sfizz/VoiceManager.cpp b/src/sfizz/VoiceManager.cpp
index f8bf71f8..b4d93e13 100644
--- a/src/sfizz/VoiceManager.cpp
+++ b/src/sfizz/VoiceManager.cpp
@@ -13,17 +13,22 @@ namespace sfz {
 
 void VoiceManager::onVoiceStateChanging(NumericId<Voice> id, Voice::State state)
 {
-    (void)id;
     if (state == Voice::State::idle) {
-        auto voice = getVoiceById(id);
-        RegionSet::removeVoiceFromHierarchy(voice->getRegion(), voice);
+        Voice* voice = getVoiceById(id);
+        const Region* region = voice->getRegion();
+        const uint32_t group = region->group;
+        RegionSet::removeVoiceFromHierarchy(region, voice);
         swapAndPopFirst(activeVoices_, [voice](const Voice* v) { return v == voice; });
-        polyphonyGroups_[voice->getRegion()->group].removeVoice(voice);
+        ASSERT(group < polyphonyGroups_.size());
+        polyphonyGroups_[group].removeVoice(voice);
     } else if (state == Voice::State::playing) {
-        auto voice = getVoiceById(id);
+        Voice* voice = getVoiceById(id);
+        const Region* region = voice->getRegion();
+        const uint32_t group = region->group;
         activeVoices_.push_back(voice);
-        RegionSet::registerVoiceInHierarchy(voice->getRegion(), voice);
-        polyphonyGroups_[voice->getRegion()->group].registerVoice(voice);
+        RegionSet::registerVoiceInHierarchy(region, voice);
+        ASSERT(group < polyphonyGroups_.size());
+        polyphonyGroups_[group].registerVoice(voice);
     }
 }
 
@@ -81,8 +86,9 @@ bool VoiceManager::playingAttackVoice(const Region* releaseRegion) noexcept
 
 void VoiceManager::ensureNumPolyphonyGroups(unsigned groupIdx) noexcept
 {
-    while (polyphonyGroups_.size() <= groupIdx)
-        polyphonyGroups_.emplace_back();
+    size_t neededSize = static_cast<size_t>(groupIdx) + 1;
+    if (polyphonyGroups_.size() < neededSize)
+        polyphonyGroups_.resize(neededSize);
 }
 
 void VoiceManager::setGroupPolyphony(unsigned groupIdx, unsigned polyphony) noexcept
@@ -99,7 +105,8 @@ const PolyphonyGroup* VoiceManager::getPolyphonyGroupView(int idx) const noexcep
 
 void VoiceManager::clear()
 {
-    reset();
+    for (PolyphonyGroup& pg : polyphonyGroups_)
+        pg.removeAllVoices();
     list_.clear();
     activeVoices_.clear();
 }