diff --git a/app/src/main/rs/radix2.rsh b/app/src/main/rs/radix2.rsh
index 9e6d989..f94176d 100644
--- a/app/src/main/rs/radix2.rsh
+++ b/app/src/main/rs/radix2.rsh
@@ -20,7 +20,7 @@ limitations under the License.
 #include "complex.rsh"
 #include "radix2_generated.rsh"
 
-static void radix2(complex_t *out, complex_t *in, int N, int S, int L)
+static void radix2(complex_t *out, float *in, int N, int S, int L)
 {
     if (1 == N) {
         out[0] = in[0];
@@ -32,9 +32,9 @@ static void radix2(complex_t *out, complex_t *in, int N, int S, int L)
     } else if (4 == N) {
         complex_t w = radix2_z[1 << L];
         out[0] = in[0] + in[S] + in[2 * S] + in[3 * S];
-        out[1] = in[0] + cmul(w, in[S]) - in[2 * S] - cmul(w, in[3 * S]);
+        out[1] = in[0] + w * in[S] - in[2 * S] - w * in[3 * S];
         out[2] = in[0] - in[S] + in[2 * S] - in[3 * S];
-        out[3] = in[0] - cmul(w, in[S]) - in[2 * S] + cmul(w, in[3 * S]);
+        out[3] = in[0] - w * in[S] - in[2 * S] + w * in[3 * S];
         return;
     }
     radix2(out, in, N / 2, 2 * S, L + 1);
diff --git a/app/src/main/rs/stft.rsh b/app/src/main/rs/stft.rsh
index fda090b..fa18605 100644
--- a/app/src/main/rs/stft.rsh
+++ b/app/src/main/rs/stft.rsh
@@ -74,7 +74,7 @@ static void spectrum_analyzer(int amplitude)
     const int M = 7;
     static int n, m;
     static int buffer[stft_N];
-    static complex_t input[radix2_N];
+    static float input[radix2_N];
     static complex_t output[radix2_N];
 
     if (disable_analyzer)
@@ -103,8 +103,8 @@ static void spectrum_analyzer(int amplitude)
     if (!(++n&(radix2_N-1))) {
         n &= stft_N - 1;
         for (int i = 0; i < stft_N; ++i)
-            input[i&(radix2_N-1)] += complex(stft_w[i] * buffer[(i+n)&(stft_N-1)], 0.0f);
-        // yep, were wasting 3x performance
+            input[i&(radix2_N-1)] += stft_w[i] * buffer[(i+n)&(stft_N-1)];
+        // yep, were wasting 2x performance
         radix2(output, input, radix2_N, 1, 0);
         for (int i = 0; i < radix2_N; ++i)
             input[i] = 0.0f;