diff --git a/release-packaging/Classes/FluidBufToKr.sc b/release-packaging/Classes/FluidBufToKr.sc
index 1661519..0e81386 100644
--- a/release-packaging/Classes/FluidBufToKr.sc
+++ b/release-packaging/Classes/FluidBufToKr.sc
@@ -18,28 +18,25 @@ FluidKrToBuf {
 
 FluidBufToKr {
 	*kr {
-		arg buffer, numFrames = -1;
+		arg buffer numFrames, startFrame=0;
 
-		if((buffer.isKindOf(Buffer).or(buffer.isKindOf(LocalBuf))).not.and(numFrames.isNil),{
-			Error("FluidBufToKr:kr needs to be passed either an existing buffer or an OutputProxy and a number of frames for the buffer that will be supplied").throw;
+		if(buffer.isKindOf(Buffer) or: {buffer.isKindOf(LocalBuf)}, {
+			numFrames = numFrames ?? {buffer.numFrames - startFrame};
+		}, {
+			numFrames = numFrames ? 1;
 		});
 
-		if(numFrames == -1,{
-			numFrames = buffer.numFrames;
-		});
-
-		if(numFrames == 0) {"FluidKrToBuf:kr indicated numFrames is zero.".warn};
 		if(numFrames > 1000) {
-			Error("FluidKrToBuf: Buffer is indicated to have % frames. This is probably not the buffer you intended.".format(numFrames)).throw;
+			Error("%: numframes is % frames. This is probably not what you intended.".format(this.class, numFrames)).throw;
 		};
 
 		if(numFrames > 1,{
 			^numFrames.collect{
 				arg i;
-				BufRd.kr(1,buffer,i,0,0);
+				BufRd.kr(1,buffer,i+startFrame,0,0);
 			}
 		},{
-			^BufRd.kr(1,buffer,0,0,0);
+			^BufRd.kr(1,buffer,startFrame,0,0);
 		});
 	}
 }
diff --git a/release-packaging/HelpSource/Classes/FluidBufToKr.schelp b/release-packaging/HelpSource/Classes/FluidBufToKr.schelp
index ea85655..cc2c087 100644
--- a/release-packaging/HelpSource/Classes/FluidBufToKr.schelp
+++ b/release-packaging/HelpSource/Classes/FluidBufToKr.schelp
@@ -12,7 +12,15 @@ METHOD:: kr
 Initialize an instance of this pseudo UGen
 
 ARGUMENT:: buffer
-The link::Classes/Buffer:: that this pseudo UGen will read out of. Must be a one-channel buffer.
+Either a link::Classes/Buffer:: object or an index opointing to a buffer that this pseudo UGen will read out of. Must be a one-channel buffer.
+
+
+ARGUMENT:: numFrames
+number of frames to read from the buffer. 
+Needs to be set, if buffer is not a code::Buffer:: object but a buffer index. If code::nil::, read whole buffer starting at code::startFrame::.
+
+ARGUMENT:: startFrame
+offset of reading position in the buffer
 
 ARGUMENT:: numFrames
 How many frames the buffer is that will evenutally passed. If providing a buffer directly (instead of as an argument to a SynthDef), the default of -1 will get the number of frames from the buffer passed.
diff --git a/release-packaging/HelpSource/Classes/FluidKrToBuf.schelp b/release-packaging/HelpSource/Classes/FluidKrToBuf.schelp
index 87b7f5b..5ba81e7 100644
--- a/release-packaging/HelpSource/Classes/FluidKrToBuf.schelp
+++ b/release-packaging/HelpSource/Classes/FluidKrToBuf.schelp
@@ -15,10 +15,9 @@ ARGUMENT:: krStream
 The Kr stream to write into the buffer.
 
 ARGUMENT:: buffer
-The link::Classes/Buffer:: to write the Kr stream into.
-
-returns:: Nothing.
+The buffer to write the Kr stream into. Can be either a link::Classes/Buffer:: object, or an index poiting to a buffer. 
 
+returns:: This class.
 
 INSTANCEMETHODS::