diff --git a/CMakeLists.txt b/CMakeLists.txt
index cdbd4fc28..909493e2e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ endif()
 set(CMAKE_OSX_DEPLOYMENT_TARGET "10.11" CACHE STRING "Minimum OS X deployment version")
 
 set(PROJECT_NAME FreeDV)
-set(PROJECT_VERSION 1.9.7.1)
+set(PROJECT_VERSION 1.9.7.2)
 set(PROJECT_DESCRIPTION "HF Digital Voice for Radio Amateurs")
 set(PROJECT_HOMEPAGE_URL "https://freedv.org")
 
diff --git a/USER_MANUAL.md b/USER_MANUAL.md
index e506d4a97..f69219865 100644
--- a/USER_MANUAL.md
+++ b/USER_MANUAL.md
@@ -889,6 +889,11 @@ LDPC | Low Density Parity Check Codes - a family of powerful FEC codes
 
 # Release Notes
 
+## V1.9.7.2 January 2024
+
+1. Bugfixes:
+    * Another attempt at fixing the crash previously thought to have been fixed by 1.9.7.1. (PR #659)
+
 ## V1.9.7.1 January 2024
 
 1. Bugfixes:
diff --git a/src/eq.cpp b/src/eq.cpp
index 62c6db144..00f2c3d81 100644
--- a/src/eq.cpp
+++ b/src/eq.cpp
@@ -58,8 +58,6 @@ void *MainFrame::designAnEQFilter(const char filterType[], float freqHz, float g
 
 void  MainFrame::designEQFilters(paCallBackData *cb, int rxSampleRate, int txSampleRate)
 {
-    deleteEQFilters(cb);
-    
     // init Mic In Equaliser Filters
     if (cb->micInEQEnable) {
         assert(cb->sbqMicInBass == nullptr && cb->sbqMicInTreble == nullptr && cb->sbqMicInMid == nullptr);
@@ -87,66 +85,57 @@ void  MainFrame::designEQFilters(paCallBackData *cb, int rxSampleRate, int txSam
         // Note: vol can be a no-op!
         assert(cb->sbqSpkOutBass != nullptr && cb->sbqSpkOutTreble != nullptr && cb->sbqSpkOutMid != nullptr);
     }
-    
-    m_newMicInFilter = false;
-    m_newSpkOutFilter = false;
 }
 
 void  MainFrame::deleteEQFilters(paCallBackData *cb)
 {
-    if (m_newMicInFilter) 
+    if (cb->sbqMicInBass != nullptr)
     {
-        if (cb->sbqMicInBass != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqMicInBass);
-        }
-        cb->sbqMicInBass = nullptr;
-        
-        if (cb->sbqMicInTreble != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqMicInTreble);
-        }
-        cb->sbqMicInTreble = nullptr;
-        
-        if (cb->sbqMicInMid != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqMicInMid);
-        }
-        cb->sbqMicInMid = nullptr;
-        
-        if (cb->sbqMicInVol != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqMicInVol);
-        }
-        cb->sbqMicInVol = nullptr;
+        sox_biquad_destroy(cb->sbqMicInBass);
     }
+    cb->sbqMicInBass = nullptr;
     
-    if (m_newSpkOutFilter) 
-    {        
-        if (cb->sbqSpkOutBass != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqSpkOutBass);    
-        }
-        cb->sbqSpkOutBass = nullptr;
-
-        if (cb->sbqSpkOutTreble != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqSpkOutTreble);
-        }
-        cb->sbqSpkOutTreble = nullptr;
-
-        if (cb->sbqSpkOutMid != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqSpkOutMid);
-        }
-        cb->sbqSpkOutMid = nullptr;
-        
-        if (cb->sbqSpkOutVol != nullptr)
-        {
-            sox_biquad_destroy(cb->sbqSpkOutVol);
-        }
-        cb->sbqSpkOutVol = nullptr;
+    if (cb->sbqMicInTreble != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqMicInTreble);
+    }
+    cb->sbqMicInTreble = nullptr;
+    
+    if (cb->sbqMicInMid != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqMicInMid);
+    }
+    cb->sbqMicInMid = nullptr;
+    
+    if (cb->sbqMicInVol != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqMicInVol);
+    }
+    cb->sbqMicInVol = nullptr;
+    
+    if (cb->sbqSpkOutBass != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqSpkOutBass);    
+    }
+    cb->sbqSpkOutBass = nullptr;
+
+    if (cb->sbqSpkOutTreble != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqSpkOutTreble);
+    }
+    cb->sbqSpkOutTreble = nullptr;
+
+    if (cb->sbqSpkOutMid != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqSpkOutMid);
+    }
+    cb->sbqSpkOutMid = nullptr;
+    
+    if (cb->sbqSpkOutVol != nullptr)
+    {
+        sox_biquad_destroy(cb->sbqSpkOutVol);
     }
+    cb->sbqSpkOutVol = nullptr;
 }
 
 
diff --git a/src/main.cpp b/src/main.cpp
index 9e88d9aff..a00bfeddd 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1512,9 +1512,7 @@ void MainFrame::OnTimer(wxTimerEvent &evt)
             g_rxUserdata->micInEQEnable = wxGetApp().appConfiguration.filterConfiguration.micInChannel.eqEnable;
             g_rxUserdata->spkOutEQEnable = wxGetApp().appConfiguration.filterConfiguration.spkOutChannel.eqEnable;
 
-            if (
-                wxGetApp().appConfiguration.filterConfiguration.micInChannel.eqEnable ||
-                wxGetApp().appConfiguration.filterConfiguration.spkOutChannel.eqEnable)
+            if (m_newMicInFilter || m_newSpkOutFilter)
             {
                 if (g_nSoundCards == 1)
                 {