delay: mix parameter keeps dry signal constant, only fades in wet signal up to 50%

delay.c

@@ -42,14 +42,14 @@ void delay_process(
     for( size_t i = 0; i < frame_size; ++i ) {
         if( delay->duration > 0 ) {
             out[i] =
-                (1.0 - delay->mix) * in[i]
-                + delay->mix * delay->buf[ delay->buf_idx ];
+                0.5 * in[i]
+                + 0.5 * delay->mix * delay->buf[ delay->buf_idx ];
 
             delay->buf[ delay->buf_idx ] *= delay->feedback;
             delay->buf[ delay->buf_idx ] += (1.0 - delay->feedback) * in[i];
             delay->buf_idx = (delay->buf_idx + 1) % delay->duration;
         } else {
-            out[i] = in[i];
+            out[i] = 0.5 * in[i];
         }
     }
 }