diff --git a/src/AquaSynth.Faust/NativeFaustRuntime.cs b/src/AquaSynth.Faust/NativeFaustRuntime.cs
index e6b44c4..bf707ef 100644
--- a/src/AquaSynth.Faust/NativeFaustRuntime.cs
+++ b/src/AquaSynth.Faust/NativeFaustRuntime.cs
@@ -840,32 +840,16 @@ internal sealed class FaustNativeToolchain : IDisposable
 
     public void SetControls(IntPtr dsp, IReadOnlyDictionary<string, float> controls, IReadOnlyDictionary<string, IntPtr> map)
     {
-        // Dictionary's struct enumerator avoids boxing one through the interface on every audio block.
-        if (controls is Dictionary<string, float> dictionary)
-        {
-            foreach (var (path, value) in dictionary)
-            {
-                WriteControl(map, path, value);
-            }
-
-            return;
-        }
-
         foreach (var (path, value) in controls)
         {
-            WriteControl(map, path, value);
-        }
-    }
+            if (!map.TryGetValue(path, out var zone) &&
+                !map.TryGetValue(path.TrimStart('/'), out zone))
+            {
+                throw new ArgumentException($"Faust control `{path}` was not exported by the compiled patch.", nameof(controls));
+            }
 
-    private static void WriteControl(IReadOnlyDictionary<string, IntPtr> map, string path, float value)
-    {
-        if (!map.TryGetValue(path, out var zone) &&
-            !map.TryGetValue(path.TrimStart('/'), out zone))
-        {
-            throw new ArgumentException($"Faust control `{path}` was not exported by the compiled patch.", "controls");
+            Marshal.Copy([value], 0, zone, 1);
         }
-
-        Marshal.WriteInt32(zone, BitConverter.SingleToInt32Bits(value));
     }
 
     public void Dispose()