diff --git a/README.textile b/README.textile
index 90fadb5..81da546 100644
--- a/README.textile
+++ b/README.textile
@@ -5,6 +5,10 @@ h3. SwitchDelay
 feedback delay line implementing switch-and-ramp technique. Seeks to avoid unwanted artefacts when switching the buffer read position/delay time.<br/>
 "example - mp3":http://rfwatson.github.com/switchdelay.mp3 (832k)
 
+h3. XCut
+
+select one from an array of signals, when index changed ramps smoothly between old and new signals
+
 h3. AverageOutput 
 
 calculates mean average of audio or control rate signal.
diff --git a/classes/RFW-UGens.sc b/classes/RFW-UGens.sc
index 55bab9b..b2c1689 100644
--- a/classes/RFW-UGens.sc
+++ b/classes/RFW-UGens.sc
@@ -17,7 +17,7 @@ SwitchDelay : UGen {
 }
 
 XCut : UGen {
-  *ar { arg inArray, which=0.0, envLength=2000;
-    ^this.multiNewList(['audio', which, envLength, inArray.size] ++ inArray.asArray);
+  *ar { arg inArray, which=0.0, envLength=2000, mul=1.0, add=0.0;
+    ^this.multiNewList(['audio', which, envLength, inArray.size] ++ inArray.asArray).madd(mul, add);
   }
 }