diff --git a/README.md b/README.md
index cba0480..c513c31 100644
--- a/README.md
+++ b/README.md
@@ -43,10 +43,10 @@ diff -s uncoded.dat decoded.dat
 
 Prerequisite: [disorders](https://github.com/aicodix/disorders)
 
-Encode ```uncoded.dat``` to [analytic](https://en.wikipedia.org/wiki/Analytic_signal) audio signal, add [multipath](https://en.wikipedia.org/wiki/Multipath_propagation), [AWGN](https://en.wikipedia.org/wiki/Additive_white_Gaussian_noise), [SFO, CFO](https://en.wikipedia.org/wiki/Carrier_frequency_offset), decode and compare:
+Encode ```uncoded.dat``` to [analytic](https://en.wikipedia.org/wiki/Analytic_signal) audio signal, add [multipath](https://en.wikipedia.org/wiki/Multipath_propagation), [CFO, SFO](https://en.wikipedia.org/wiki/Carrier_frequency_offset), [AWGN](https://en.wikipedia.org/wiki/Additive_white_Gaussian_noise), decode and compare:
 
 ```
-./encode ping.wav 8000 16 2 uncoded.dat 2000 && ../disorders/multipath pong.wav ping.wav ../disorders/multipath.txt 10 && ../disorders/cfo ping.wav pong.wav 234.567 && ../disorders/sfo pong.wav ping.wav 147 && ../disorders/awgn ping.wav pong.wav -30 && ./decode decoded.dat ping.wav && diff -s uncoded.dat decoded.dat
+./encode - 8000 16 2 uncoded.dat 2000 | ../disorders/multipath - - ../disorders/multipath.txt 10 | ../disorders/cfo - - 234.567 | ../disorders/sfo - - 147 | ../disorders/awgn - - -30 | ./decode - - | diff -s uncoded.dat -
 ```
 
 ### Reading