diff --git a/plugin/module.cpp b/plugin/module.cpp
index 73e404a..9d9ba2c 100644
--- a/plugin/module.cpp
+++ b/plugin/module.cpp
@@ -85,7 +85,7 @@ void Module::runLFO() {
 
     pw = (lfoState & 0x02) ? lfoPhase + 0x2000 : 0x2000 - lfoPhase;  // PW LFO is unipolar
     pw = (patchRam.switch2 & 0x01) ? 0x3fff : pw;                    // either LFO or "all on"
-    pw = 0x3fff - ((pw * patchRam.pwmLfo) >> 7);                     // scaled by PWM pot
+    pw = 0x3fff - ((pw * (int)(patchRam.pwmLfo*1.45)) >> 7);    // FIXME tidy up this bit
 }
 
 void Module::run(Voice* voices, uint32_t blockSize) {
@@ -106,7 +106,7 @@ void Module::run(Voice* voices, uint32_t blockSize) {
 
     square = (patchRam.switch1 & 0x08) ? 1 : 0;
     saw = (patchRam.switch1 & 0x10) ? 1 : 0;
-    sub = (patchRam.sub / 127.0f) * 1.6;
+    sub = (patchRam.sub / 127.0f) * 1.4;
 
     res = patchRam.vcfReso / 127.0;
     noise = (patchRam.noise / 127.0);
@@ -143,7 +143,6 @@ void Module::run(Voice* voices, uint32_t blockSize) {
     pitchBase += lfoToVco;
     pitchBase += /* pitch bend FIXME */ 0;
 
-    // int16_t vcf = (patchRam.vcfEnv << 7) * ((patchRam.switch2 & 0x02) ? -1 : 1);
     vcfBase = (patchRam.vcfFreq << 7) + /* vcf bend FIXME */ 0;
     vcfBase += lfoToVcf;
     if (vcfBase > 0x3fff) vcfBase = 0x3fff;
diff --git a/plugin/voice.cpp b/plugin/voice.cpp
index 918cd46..6f6f80b 100644
--- a/plugin/voice.cpp
+++ b/plugin/voice.cpp
@@ -72,7 +72,7 @@ void Voice::run(Module* m, float* buffer, uint32_t framePos, uint32_t samples) {
 
     float r = 5 * m->res;
 
-    float amp = vcaEnv / 16384.0f;
+    float amp = vcaEnv / 32768.0f;
 
     for (uint32_t i = 0; i < samples; i++) {
         out = delay;
@@ -117,8 +117,8 @@ void Voice::run(Module* m, float* buffer, uint32_t framePos, uint32_t samples) {
             fb = y3;
             // hard clip
             fb = ((out * 0.5) - fb) * r;
-            if (fb > 2) fb = 2;
-            if (fb < -2) fb = -2;
+            if (fb > 6) fb = 6;
+            if (fb < -6) fb = -6;
 
             y0 = ((out + fb - y0) * vcfRC) + y0;
             y1 = ((y0 - y1) * vcfRC) + y1;