diff --git a/fdNMF.cpp b/fdNMF.cpp
index f5e7080..ec77ec1 100644
--- a/fdNMF.cpp
+++ b/fdNMF.cpp
@@ -18,13 +18,17 @@ void BufNMF(World *world, struct SndBuf *srcBuf, struct sc_msg_iter *msg)
 	size_t srcFrameCount = srcBuf->frames;
 	size_t srcChanCount = srcBuf->channels;
 
-	size_t dstBufNum = msg->geti();
+	long dstBufNum = msg->geti();
+	long dictBufNum = msg->geti();
+	long actBufNum = msg->geti();
 	size_t rank = msg->geti();
 	size_t iterations = msg->geti();
 	size_t fftSize = msg->geti();
 	size_t windowSize = msg->geti();
 	size_t hopSize = msg->geti();
 
+	Print("%i %i %i\n", dstBufNum, dictBufNum, actBufNum);
+	
 	if (dstBufNum >= world->mNumSndBufs){
 		Print("fdNMF is not happy because the destination buffer does not exist.\n");
 		return;
diff --git a/fdfNMF.sc b/fdfNMF.sc
index e2ab467..d4f7aee 100644
--- a/fdfNMF.sc
+++ b/fdfNMF.sc
@@ -1,6 +1,6 @@
 // adds an instance method to the Buffer class
 + Buffer {
-	fdNMF { arg dstBuf, rank = 1, iterations = 100, fftSize = 2048, windowSize = 2048, hopSize = 512, action;
+	fdNMF { arg dstBuf, dictBuf, actBuf, rank = 1, iterations = 100, fftSize = 2048, windowSize = 2048, hopSize = 512, action;
 		var resp;
 
 		if(bufnum.isNil) { Error("Cannot call % on a % that has been freed".format(thisMethod.name, this.class.name)).throw };
@@ -13,6 +13,6 @@
 			});
 		}, '/done', server.addr);
 
-		server.listSendMsg([\b_gen, bufnum, "BufNMF", dstBuf.bufnum, rank, iterations, fftSize, windowSize, hopSize])
+		server.listSendMsg([\b_gen, bufnum, "BufNMF", if(dstBuf.isNil, -1, {dstBuf.bufnum}), if(dictBuf.isNil, -1, {dictBuf.bufnum}), if(actBuf.isNil, -1, {actBuf.bufnum}), rank, iterations, fftSize, windowSize, hopSize])
 	}
 }
diff --git a/tests.scd b/tests.scd
index 11be1f8..94ed39b 100644
--- a/tests.scd
+++ b/tests.scd
@@ -5,8 +5,11 @@ s.reboot
 b = Buffer.read(s,"/Users/pa/Documents/documents@hudd/research/projects/fluid corpus navigation/research/denoise_stn/sources/01-mix.wav");
 b.play;
 c = Buffer.alloc(s,b.numFrames,5);
+x = Buffer.alloc(s,b.numFrames,5);
+y = Buffer.alloc(s,b.numFrames,5);
 
-d = Main.elapsedTime; b.fdNMF(c,5, 100, 1024,1024,256,{e = Main.elapsedTime; (e-d).postln})
+
+d = Main.elapsedTime; b.fdNMF(c, x, nil, 5, 100, 1024,1024,256,{e = Main.elapsedTime; (e-d).postln})
 
 {(PlayBuf.ar(5,c.bufnum,doneAction:2).sum)+(-1*PlayBuf.ar(1,b.bufnum,doneAction:2))}.play
 {Splay.ar(PlayBuf.ar(5,c.bufnum,doneAction:2))}.play
@@ -14,6 +17,8 @@ d = Main.elapsedTime; b.fdNMF(c,5, 100, 1024,1024,256,{e = Main.elapsedTime; (e-
 {PlayBuf.ar(5,c.bufnum,doneAction:2)[0].dup}.play
 
 
+
+
 ////////////////////////////
 // test for osc clutter