diff --git a/Using-OpenWebRX-with-a-real-input-signal.md b/Using-OpenWebRX-with-a-real-input-signal.md
index b4a9797..b1db9c7 100644
--- a/Using-OpenWebRX-with-a-real-input-signal.md
+++ b/Using-OpenWebRX-with-a-real-input-signal.md
@@ -1,10 +1,11 @@
 A workaround for this is to convert the real signal into a complex signal, as the DDC routines currently only work for a real signal. 
 
-In this example, we are using an audio card as a VLF SDR.
+In this example, we are using an audio card as a VLF SDR:
 
 ```
-samp_rate = 192000 / 2
-start_rtl_command = "arecord -f S16_LE -r 192000 -c1 - | csdr convert_s16_f | csdr shift_addition_cc -0.25 | csdr fir_decimate_cc 2 0.005"
+center_freq = 192000 / 2
+samp_rate = 192000 / 4
+start_rtl_command = "arecord -f S16_LE -r 192000 -c1 - | csdr through | csdr convert_s16_f | csdr shift_addition_cc -0.25 | csdr fir_decimate_cc 2 0.005"
 format_conversion = ""
 ```