diff --git a/examples/librispeech/s2/conf/fbank.conf b/examples/librispeech/s2/conf/fbank.conf
new file mode 100644
index 0000000000000000000000000000000000000000..82ac7bd0dbc50d716b9a901e9bd0d02186809f11
--- /dev/null
+++ b/examples/librispeech/s2/conf/fbank.conf
@@ -0,0 +1,2 @@
+--sample-frequency=16000 
+--num-mel-bins=80
diff --git a/examples/librispeech/s2/conf/pitch.conf b/examples/librispeech/s2/conf/pitch.conf
new file mode 100644
index 0000000000000000000000000000000000000000..e959a19d5b8988562d539b98c905bc7129bcd4d6
--- /dev/null
+++ b/examples/librispeech/s2/conf/pitch.conf
@@ -0,0 +1 @@
+--sample-frequency=16000
diff --git a/tools/Makefile b/tools/Makefile
index 36ac7d5490f4f7235be8f48d540594431e0af0a3..4d60fd7f4f9b36519f5dbcd1d0580f4d2bb67f33 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -25,6 +25,7 @@ clean:
 apt.done:
 	apt update -y
 	apt install -y flac jq vim tig tree pkg-config libflac-dev libogg-dev libvorbis-dev libboost-dev swig python3-dev 
+	echo "check_certificate = off" >> ~/.wgetrc
 	touch apt.done
 
 kenlm.done:
@@ -55,7 +56,7 @@ mfa.done:
 	touch mfa.done
 
 kaldi.done:
-	test -d kaldi || git clone --depth 1 https://github.com/kaldi-asr/kaldi
+	bash extras/install_kaldi.sh
 	touch kaldi.done
 
 #== SCTK ===============================================================================