diff --git a/main.cpp b/main.cpp
index 8271822..1f7975c 100644
--- a/main.cpp
+++ b/main.cpp
@@ -43,9 +43,9 @@ static int paCallback(
             value += state->oscs[j].tick();
         }
         value /= NUM_OSCS;
-        value *= 0.5;
         state->filter.setFrequency(0.21 + 0.20 * cos(M_PI * state->time));
         value = state->filter.tick(value);
+        value = 0.25 * sin(M_PI_2 * clamp(value, -1, 1));
         *out++ = value;
         *out++ = value;
         state->time += 1.0 / SAMPLE_RATE;