diff --git a/src/sfizz/Synth.cpp b/src/sfizz/Synth.cpp
index cefacad2..3ea3236f 100644
--- a/src/sfizz/Synth.cpp
+++ b/src/sfizz/Synth.cpp
@@ -722,6 +722,9 @@ void Synth::Impl::finalizeSfzLoad()
     applySettingsPerVoice();
 
     setupModMatrix();
+
+    // cache the set of used CCs for future access
+    currentUsedCCs_ = collectAllUsedCCs();
 }
 
 bool Synth::loadScalaFile(const fs::path& path)
@@ -1677,14 +1680,10 @@ void Synth::allSoundOff() noexcept
         effectBus->clear();
 }
 
-std::bitset<config::numCCs> Synth::getUsedCCs() const noexcept
+const std::bitset<config::numCCs>& Synth::getUsedCCs() const noexcept
 {
     Impl& impl = *impl_;
-    std::bitset<config::numCCs> used;
-    for (const Impl::RegionPtr& region : impl.regions_)
-        impl.collectUsedCCsFromRegion(used, *region);
-    impl.collectUsedCCsFromModulations(used, impl.resources_.modMatrix);
-    return used;
+    return impl.currentUsedCCs_;
 }
 
 void sfz::Synth::setBroadcastCallback(sfizz_receive_t* broadcast, void* data)
@@ -1750,6 +1749,15 @@ void Synth::Impl::collectUsedCCsFromModulations(std::bitset<config::numCCs>& use
     mm.visitSources(vtor);
 }
 
+std::bitset<config::numCCs> Synth::Impl::collectAllUsedCCs()
+{
+    std::bitset<config::numCCs> used;
+    for (const Impl::RegionPtr& region : regions_)
+        collectUsedCCsFromRegion(used, *region);
+    collectUsedCCsFromModulations(used, resources_.modMatrix);
+    return used;
+}
+
 Parser& Synth::getParser() noexcept
 {
     Impl& impl = *impl_;
diff --git a/src/sfizz/Synth.h b/src/sfizz/Synth.h
index 1d971d80..0e53b17e 100644
--- a/src/sfizz/Synth.h
+++ b/src/sfizz/Synth.h
@@ -584,7 +584,7 @@ public:
      *
      * @return const std::bitset<config::numCCs>&
      */
-    std::bitset<config::numCCs> getUsedCCs() const noexcept;
+    const std::bitset<config::numCCs>& getUsedCCs() const noexcept;
 
     /**
      * @brief Dispatch the incoming message to the synth engine
diff --git a/src/sfizz/SynthPrivate.h b/src/sfizz/SynthPrivate.h
index 3c9569af..5daf775b 100644
--- a/src/sfizz/SynthPrivate.h
+++ b/src/sfizz/SynthPrivate.h
@@ -177,6 +177,8 @@ struct Synth::Impl final: public Parser::Listener {
     static void collectUsedCCsFromRegion(std::bitset<config::numCCs>& usedCCs, const Region& region);
     static void collectUsedCCsFromModulations(std::bitset<config::numCCs>& usedCCs, const ModMatrix& mm);
 
+    std::bitset<config::numCCs> collectAllUsedCCs();
+
     /**
      * @brief Set the default value for a CC
      *
@@ -268,6 +270,7 @@ struct Synth::Impl final: public Parser::Listener {
     fs::file_time_type modificationTime_ { };
 
     std::array<float, config::numCCs> defaultCCValues_;
+    std::bitset<config::numCCs> currentUsedCCs_;
 
     // Messaging
     sfizz_receive_t* broadcastReceiver = nullptr;