diff --git a/fdNMF.cpp b/fdNMF.cpp
index 5809815..d5f3554 100644
--- a/fdNMF.cpp
+++ b/fdNMF.cpp
@@ -13,8 +13,10 @@ void BufNMF(World *world, struct SndBuf *dstBuf, struct sc_msg_iter *msg)
 	int dstChanCount = dstBuf->channels;
 
 	uint32 srcBufNum = msg->geti();
-	int repetitions = msg->geti();
-	uint32 rank = 5;
+	uint32 rank = msg->geti();
+	uint32 fftSize = msg->geti();
+	uint32 windowSize = msg->geti();
+	uint32 hopSize = msg->geti();
 
 	if (srcBufNum >= world->mNumSndBufs){
 		Print("fdNMF is not happy because the source buffer does not exist.\n");
@@ -31,8 +33,6 @@ void BufNMF(World *world, struct SndBuf *dstBuf, struct sc_msg_iter *msg)
 	int srcFrameCount = srcBuf->frames;
 	int srcChanCount = srcBuf->channels;
 
-	Print("dstChanCount = %d\n",dstChanCount);
-
 	// if (dstChanCount < rank) {
 	// 	Print("fdNMF is not happy because the destination buffer has a lower channel count than the number of ranks.\n");
 	// 	return;
@@ -42,8 +42,8 @@ void BufNMF(World *world, struct SndBuf *dstBuf, struct sc_msg_iter *msg)
 	std::vector<double> tmp_vec(srcFrameCount);
 
 	//construct STFT processors
-	stft::STFT stft(1024, 2048, 256);
-	stft::ISTFT istft(1024, 2048, 256);
+	stft::STFT stft(windowSize, fftSize, hopSize);
+	stft::ISTFT istft(windowSize, fftSize, hopSize);
 
 	//for each channels
 	for (int j=0;j<srcChanCount;j++){
diff --git a/fdfNMF.sc b/fdfNMF.sc
index 80c0e3e..87f90e1 100644
--- a/fdfNMF.sc
+++ b/fdfNMF.sc
@@ -1,7 +1,7 @@
 // adds an instance method to the Buffer class
 + Buffer {
-	fdNMF { arg dstBuf, repetitions = 0;
+	fdNMF { arg dstBuf, rank = 1, fftSize = 2048, windowSize = 2048, hopSize = 512;
 		if(bufnum.isNil) { Error("Cannot call % on a % that has been freed".format(thisMethod.name, this.class.name)).throw };
-		server.listSendMsg([\b_gen, dstBuf.bufnum, "BufNMF", bufnum, repetitions])
+		server.listSendMsg([\b_gen, dstBuf.bufnum, "BufNMF", bufnum, rank, fftSize, windowSize, hopSize])
 	}
 }
diff --git a/tests.scd b/tests.scd
index a991072..af62719 100644
--- a/tests.scd
+++ b/tests.scd
@@ -7,7 +7,7 @@ b.plot;
 c = Buffer.alloc(s,50000);
 
 // run the code
-b.fdNMF(c);
+b.fdNMF(c, 5, 2048, 1024, 256);
 
 // read to check
 c.plot
\ No newline at end of file