diff --git a/HelpSource/Classes/LFCub.schelp b/HelpSource/Classes/LFCub.schelp
index e7767557f57..38d81b2ac44 100644
--- a/HelpSource/Classes/LFCub.schelp
+++ b/HelpSource/Classes/LFCub.schelp
@@ -19,7 +19,7 @@ Frequency in Hertz.
 
 argument::iphase
 
-Initial phase offset.
+Initial phase offset. For efficiency reasons this is a value ranging from 0 to 2.
 
 
 argument::mul
diff --git a/HelpSource/Classes/LFPar.schelp b/HelpSource/Classes/LFPar.schelp
index 154ae428c61..723816ca30c 100644
--- a/HelpSource/Classes/LFPar.schelp
+++ b/HelpSource/Classes/LFPar.schelp
@@ -18,7 +18,7 @@ Frequency in Hertz.
 
 argument::iphase
 
-Initial phase in cycles ( 0..1 ).
+Initial phase offset. For efficiency reasons this is a value ranging from 0 to 4.
 
 
 argument::mul
diff --git a/HelpSource/Classes/LFTri.schelp b/HelpSource/Classes/LFTri.schelp
index effecdc9e0e..a98cded4416 100644
--- a/HelpSource/Classes/LFTri.schelp
+++ b/HelpSource/Classes/LFTri.schelp
@@ -14,7 +14,7 @@ classmethods::
 method::ar, kr
 
 argument::freq
-Frequency in Hertz.
+Frequency in Hertz. For efficiency reasons, only positive values result in correct behavior.
 
 argument::iphase