diff --git a/signalgen.py b/signalgen.py
index b470f4e..4781dfa 100755
--- a/signalgen.py
+++ b/signalgen.py
@@ -81,8 +81,7 @@ def addBurst(values):
 	
 	#the full filterbanks use 64GB in RAM, so we write out a truncated version and load that instead.
 	filWriter = Writer(filterbankObj, outdir="./", outname = f"{basename}_trunc", nstart = 0, nsamp = samples)
-	spectra = filterbankObj.get_data(0, samples)
-	filWriter.to_fil(data=spectra)
+	filWriter.to_fil()
 	#replace filterbankObj object and reload spectra (spectra should be the same but just in case)
 	filterbankObj = Your(path.join("./", f"{basename}_trunc.fil"))
 	spectra = filterbankObj.get_data(0, samples)