diff --git a/usermods/usermod_v2_auto_playlist/usermod_v2_auto_playlist.h b/usermods/usermod_v2_auto_playlist/usermod_v2_auto_playlist.h
index c15f116e..d08f295f 100644
--- a/usermods/usermod_v2_auto_playlist/usermod_v2_auto_playlist.h
+++ b/usermods/usermod_v2_auto_playlist/usermod_v2_auto_playlist.h
@@ -85,7 +85,8 @@ class AutoPlaylistUsermod : public Usermod {
     // gets called once at boot. Do all initialization that doesn't depend on
     // network here
     void setup() {
-      USER_PRINTLN("AutoPlaylistUsermod");
+      USER_PRINT(F("AutoPlaylistUsermod startup; enabled = "));
+      USER_PRINT(enabled ? F("true"):F("false")); USER_PRINTLN(F("."));
       initDone = true;
     }
 
diff --git a/wled00/bus_manager.cpp b/wled00/bus_manager.cpp
index 0dad3ffc..f4e32bd4 100644
--- a/wled00/bus_manager.cpp
+++ b/wled00/bus_manager.cpp
@@ -729,12 +729,12 @@ uint32_t BusManager::memUsage(BusConfig &bc) {
 
 int BusManager::add(BusConfig &bc) {
   if (getNumBusses() - getNumVirtualBusses() >= WLED_MAX_BUSSES) return -1;
-  USER_PRINTF("BusManager::add(bc.type=%u)\n", bc.type);
+  DEBUG_PRINTF("BusManager::add(bc.type=%u)\n", bc.type);
   if (bc.type >= TYPE_NET_DDP_RGB && bc.type < 96) {
     busses[numBusses] = new BusNetwork(bc);
 #ifdef WLED_ENABLE_HUB75MATRIX
   } else if (bc.type >= TYPE_HUB75MATRIX && bc.type <= (TYPE_HUB75MATRIX + 10)) {
-    USER_PRINTLN("BusManager::add - Adding BusHub75Matrix");
+    DEBUG_PRINTLN("BusManager::add - Adding BusHub75Matrix");
     busses[numBusses] = new BusHub75Matrix(bc);
 #endif
   } else if (IS_DIGITAL(bc.type)) {
diff --git a/wled00/util.cpp b/wled00/util.cpp
index ceefcc2f..8e6d349a 100644
--- a/wled00/util.cpp
+++ b/wled00/util.cpp
@@ -433,6 +433,7 @@ um_data_t* simulateSound(uint8_t simulationId)
   static float    volumeSmth;
   static uint16_t volumeRaw;
   static float    my_magnitude;
+  static uint16_t zeroCrossingCount = 0; // number of zero crossings in the current batch of 512 samples
 
   //arrays
   uint8_t *fftResult;
@@ -447,7 +448,7 @@ um_data_t* simulateSound(uint8_t simulationId)
     // NOTE!!!
     // This may change as AudioReactive usermod may change
     um_data = new um_data_t;
-    um_data->u_size = 11;
+    um_data->u_size = 12;
     um_data->u_type = new um_types_t[um_data->u_size];
     um_data->u_data = new void*[um_data->u_size];
     um_data->u_data[0] = &volumeSmth;
@@ -461,6 +462,7 @@ um_data_t* simulateSound(uint8_t simulationId)
     um_data->u_data[8]  = &FFT_MajorPeak; // dummy (FFT Peak smoothed)
     um_data->u_data[9]  = &volumeSmth;    // dummy (soundPressure)
     um_data->u_data[10] = &volumeSmth;    // dummy (agcSensitivity)
+    um_data->u_data[11] = &zeroCrossingCount;
   } else {
     // get arrays from um_data
     fftResult =  (uint8_t*)um_data->u_data[2];
@@ -527,6 +529,7 @@ um_data_t* simulateSound(uint8_t simulationId)
   volumeRaw = volumeSmth;
   my_magnitude = 10000.0f / 8.0f; //no idea if 10000 is a good value for FFT_Magnitude ???
   if (volumeSmth < 1 ) my_magnitude = 0.001f;             // noise gate closed - mute
+  zeroCrossingCount = floorf(FFT_MajorPeak / 36.0f); // 9Khz max frequency => 255 zero crossings
 
   return um_data;
 }