diff --git a/internal/c/parts/audio/out/audio.cpp b/internal/c/parts/audio/out/audio.cpp
index 6430d70b0..b10c77da8 100644
--- a/internal/c/parts/audio/out/audio.cpp
+++ b/internal/c/parts/audio/out/audio.cpp
@@ -692,9 +692,22 @@ static ma_uint8 *GenerateWaveform(double frequency, double length, double volume
         samplesi = 1;
 
     *soundwave_bytes = samplesi * SAMPLE_FRAME_SIZE(ma_int16, 2);
-    data = (ma_uint8 *)malloc(*soundwave_bytes);
+
+    // Frequency equal to or above 20000 will produce silence
+    // This is per QuickBASIC 4.5 behavior
+    if (frequency < 20000)
+    {
+        data = (ma_uint8 *)malloc(*soundwave_bytes);
+    }
+    else
+    {
+        data = (ma_uint8 *)calloc(*soundwave_bytes, sizeof(ma_uint8));
+        return data;
+    }
+
     if (!data)
         return nullptr;
+
     sp = (ma_int16 *)data;
 
     direction = 1;
@@ -744,7 +757,7 @@ static ma_uint8 *GenerateWaveform(double frequency, double length, double volume
     if (waveend)
         *soundwave_bytes = waveend * SAMPLE_FRAME_SIZE(ma_int16, 2);
 
-    return (ma_uint8 *)data;
+    return data;
 }
 
 /// <summary>