diff --git a/doc/en/sidplayfp.ini.pod b/doc/en/sidplayfp.ini.pod
index 7343540..896172c 100644
--- a/doc/en/sidplayfp.ini.pod
+++ b/doc/en/sidplayfp.ini.pod
@@ -228,6 +228,11 @@ Controls the filter curve for the 8580 model in the ReSIDfp
 emulation.  Ranges from 0.0 (light) to 1.0 (dark), the default
 value is 0.5.
 
+=item B<CombinedWaveforms>=I<< <AVERAGE|WEAK|STRONG> >>
+
+Controls the combined waveforms strength in the ReSIDfp
+emulation.  The default value is AVERAGE.
+
 =item B<PowerOnDelay>=I<< <number> >>
 
 The c64 power on delay as number of cpu cycles.
diff --git a/src/IniConfig.cpp b/src/IniConfig.cpp
index d274f5e..645f6aa 100644
--- a/src/IniConfig.cpp
+++ b/src/IniConfig.cpp
@@ -1,7 +1,7 @@
 /*
  * This file is part of sidplayfp, a console SID player.
  *
- * Copyright 2011-2023 Leandro Nini
+ * Copyright 2011-2024 Leandro Nini
  * Copyright 2000-2001 Simon White
  *
  * This program is free software; you can redistribute it and/or modify
@@ -123,6 +123,7 @@ void IniConfig::clear()
     emulation_s.filterRange6581 = 0.5;
 #endif
     emulation_s.filterCurve8580 = 0.5;
+    emulation_s.combinedWaveformsStrength = SidConfig::AVERAGE;
     emulation_s.powerOnDelay = -1;
     emulation_s.samplingMethod = SidConfig::RESAMPLE_INTERPOLATE;
     emulation_s.fastSampling = false;
@@ -434,6 +435,19 @@ void IniConfig::readEmulation(iniHandler &ini)
 #endif
     readDouble(ini, TEXT("FilterCurve8580"), emulation_s.filterCurve8580);
 
+    {
+        SID_STRING str = readString(ini, TEXT("CombinedWaveforms"));
+        if (!str.empty())
+        {
+            if (str.compare(TEXT("AVERAGE")) == 0)
+                emulation_s.combinedWaveformsStrength = SidConfig::AVERAGE;
+            else if (str.compare(TEXT("WEAK")) == 0)
+                emulation_s.combinedWaveformsStrength = SidConfig::WEAK;
+            else if (str.compare(TEXT("STRONG")) == 0)
+                emulation_s.combinedWaveformsStrength = SidConfig::STRONG;
+        }
+    }
+
     readInt(ini, TEXT("PowerOnDelay"), emulation_s.powerOnDelay);
 
     {
diff --git a/src/IniConfig.h b/src/IniConfig.h
index e0a06ac..f1a2f03 100644
--- a/src/IniConfig.h
+++ b/src/IniConfig.h
@@ -86,6 +86,7 @@ class IniConfig
         double        filterRange6581;
 #endif
         double        filterCurve8580;
+        SidConfig::sid_cw_t combinedWaveformsStrength;
         int           powerOnDelay;
         SidConfig::sampling_method_t  samplingMethod;
         bool          fastSampling;
diff --git a/src/player.cpp b/src/player.cpp
index d23816e..80e5a33 100644
--- a/src/player.cpp
+++ b/src/player.cpp
@@ -372,6 +372,7 @@ ConsolePlayer::ConsolePlayer (const char * const name) :
         m_filter.filterRange6581 = emulation.filterRange6581;
 #endif
         m_filter.filterCurve8580 = emulation.filterCurve8580;
+        m_combinedWaveformsStrength = emulation.combinedWaveformsStrength;
 
         if (emulation.powerOnDelay >= 0)
             m_engCfg.powerOnDelay    = emulation.powerOnDelay;
@@ -595,6 +596,8 @@ bool ConsolePlayer::createSidEmu (SIDEMUS emu, const SidTuneInfo *tuneInfo)
             rs->create ((m_engine.info ()).maxsids());
             if (!rs->getStatus()) goto createSidEmu_error;
 
+            rs->combinedWaveformsStrength(m_combinedWaveformsStrength);
+
 #ifdef FEAT_FILTER_RANGE
             double frange = -1.0;
             if (m_autofilter && (tuneInfo->numberOfInfoStrings() == 3))
diff --git a/src/player.h b/src/player.h
index d1e6b44..d20aaab 100644
--- a/src/player.h
+++ b/src/player.h
@@ -128,6 +128,8 @@ class ConsolePlayer
 
     double             m_fcurve;
 
+    SidConfig::sid_cw_t m_combinedWaveformsStrength;
+
     uint8_t            m_registers[3][32];
     uint16_t*          m_freqTable;
 
diff --git a/src/sidlib_features.h b/src/sidlib_features.h
index 62b89ef..bb8d9e5 100644
--- a/src/sidlib_features.h
+++ b/src/sidlib_features.h
@@ -1,7 +1,7 @@
 /*
  * This file is part of sidplayfp, a console SID player.
  *
- * Copyright 2024 Leandro Nini
+ * Copyright 2021-2024 Leandro Nini
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -41,6 +41,7 @@
 
 #if LIBSIDPLAYFP_VERSION_MAJ > 2 || (LIBSIDPLAYFP_VERSION_MAJ == 2 && LIBSIDPLAYFP_VERSION_MIN >= 7)
 #  define FEAT_FILTER_RANGE
+#  define FEAT_CW_STRENGTH
 #endif
 
 #endif