diff --git a/src/monocoque/devices/hapticeffect.c b/src/monocoque/devices/hapticeffect.c
index 506fcf1..2501a37 100644
--- a/src/monocoque/devices/hapticeffect.c
+++ b/src/monocoque/devices/hapticeffect.c
@@ -340,6 +340,7 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
                         wheelslip[i] = 0;
                     }
                 }
+                slogt("wheelslip values are %f %f %f %f", simdata->tyrediameter[0], simdata->tyrediameter[1], simdata->tyrediameter[2], simdata->tyrediameter[3]);
 
             }
             break;
@@ -357,6 +358,7 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
                 if(wheelslip[0] < -threshold)
                 {
                     play += fabs(wheelslip[0]) - fabs(threshold);
+                    slogt("slip is %f", play);
                 }
             }
             if (tyre == FRONTRIGHT || tyre == FRONTS || tyre == ALLFOUR)
@@ -364,6 +366,7 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
                 if(wheelslip[1] < -threshold)
                 {
                     play += fabs(wheelslip[1]) - fabs(threshold);
+                    slogt("slip is %f", play);
                 }
             }
             if (tyre == REARLEFT || tyre == REARS || tyre == ALLFOUR)
@@ -371,6 +374,7 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
                 if(wheelslip[2] < -threshold)
                 {
                     play += fabs(wheelslip[2]) - fabs(threshold);
+                    slogt("slip is %f", play);
                 }
             }
             if (tyre == REARRIGHT || tyre == REARS || tyre == ALLFOUR)
@@ -378,11 +382,11 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
                 if(wheelslip[3] < -threshold)
                 {
                     play += fabs(wheelslip[3]) - fabs(threshold);
+                    slogt("slip is %f", play);
                 }
             }
-
-
             break;
+
         case (EFFECT_TYRELOCK):
             if (tyre == FRONTLEFT || tyre == FRONTS || tyre == ALLFOUR)
             {
diff --git a/src/monocoque/devices/sounddevice.c b/src/monocoque/devices/sounddevice.c
index c60c3a4..b649436 100644
--- a/src/monocoque/devices/sounddevice.c
+++ b/src/monocoque/devices/sounddevice.c
@@ -42,7 +42,8 @@ int sounddev_tyreslip_update(SimDevice* this, SimData* simdata)
 {
     SoundDevice* sounddevice = (void *) this->derived;
 
-    int play = slipeffect(simdata, this->hapticeffect.effecttype, this->hapticeffect.tyre, this->hapticeffect.threshold, this->hapticeffect.useconfig, this->hapticeffect.configcheck, this->hapticeffect.tyrediameterconfig);
+    double play = slipeffect(simdata, this->hapticeffect.effecttype, this->hapticeffect.tyre, this->hapticeffect.threshold, this->hapticeffect.useconfig, this->hapticeffect.configcheck, this->hapticeffect.tyrediameterconfig);
+    slogt("Updating sound device frequency from original effect %f", play);
 
     if (play > 0)
     {
@@ -54,13 +55,14 @@ int sounddev_tyreslip_update(SimDevice* this, SimData* simdata)
         sounddevice->sounddata.curr_frequency = 0;
         sounddevice->sounddata.curr_duration = 0;
     }
+
 }
 
 int sounddev_tyrelock_update(SimDevice* this, SimData* simdata)
 {
     SoundDevice* sounddevice = (void *) this->derived;
 
-    int play = slipeffect(simdata, this->hapticeffect.effecttype, this->hapticeffect.tyre, this->hapticeffect.threshold, this->hapticeffect.useconfig, this->hapticeffect.configcheck, this->hapticeffect.tyrediameterconfig);
+    double play = slipeffect(simdata, this->hapticeffect.effecttype, this->hapticeffect.tyre, this->hapticeffect.threshold, this->hapticeffect.useconfig, this->hapticeffect.configcheck, this->hapticeffect.tyrediameterconfig);
 
     if (play > 0)
     {
@@ -77,10 +79,11 @@ int sounddev_tyrelock_update(SimDevice* this, SimData* simdata)
 int sounddev_absbrakes_update(SimDevice* this, SimData* simdata)
 {
     SoundDevice* sounddevice = (void *) this->derived;
+    double play = slipeffect(simdata, this->hapticeffect.effecttype, this->hapticeffect.tyre, this->hapticeffect.threshold, this->hapticeffect.useconfig, this->hapticeffect.configcheck, this->hapticeffect.tyrediameterconfig);
 
-    if (simdata->abs > 0)
+    if (play > 0)
     {
-        sounddevice->sounddata.curr_frequency = sounddevice->sounddata.frequency;
+        sounddevice->sounddata.curr_frequency = sounddevice->sounddata.frequency * play;
         sounddevice->sounddata.curr_duration = sounddevice->sounddata.duration;
     }
     else