diff --git a/plugin/chorus.cpp b/plugin/chorus.cpp
index 06b4f92..36c20c0 100644
--- a/plugin/chorus.cpp
+++ b/plugin/chorus.cpp
@@ -139,8 +139,8 @@ void Chorus::setHpf(uint8_t mode) {
             hpGain = 0;
             break;
         case 0x18:
-            hpCut = 1 - exp(-M_PI * 85 / sampleRate);
-            hpGain = 1.707;
+            hpCut = 1 - exp(-6.283 * 85 / sampleRate);
+            hpGain = 1.0;
             break;
     }
 }
diff --git a/plugin/module.cpp b/plugin/module.cpp
index 6f55c87..73e404a 100644
--- a/plugin/module.cpp
+++ b/plugin/module.cpp
@@ -46,7 +46,7 @@ void Module::genNoise() {
     for (uint32_t i = 0; i < bufferSize; i++) {
         noiseRNG *= 0x8088405;
         noiseRNG++;
-        noiseBuf[i] = 2 - (noiseRNG & 0xffff) / 16384.0f;
+        noiseBuf[i] = 1 - (noiseRNG & 0xffff) / 32768.0f;
     }
 }