diff --git a/code/chirpdetection.py b/code/chirpdetection.py
index 95800df..a5d1a2b 100755
--- a/code/chirpdetection.py
+++ b/code/chirpdetection.py
@@ -18,7 +18,6 @@ from modules.datahandling import (
     purge_duplicates,
     group_timestamps,
     instantaneous_frequency,
-    instantaneous_frequency2, 
     minmaxnorm,
 )
 
diff --git a/protocol/main.pdf b/protocol/main.pdf
new file mode 100644
index 0000000..e83aea8
Binary files /dev/null and b/protocol/main.pdf differ
diff --git a/requirements.txt b/requirements.txt
index b6a16c7..00bb2e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,3 @@
-audioio==0.10.0
 cmocean==3.0.3
 cycler==0.11.0
 ipython==8.12.0
@@ -9,5 +8,4 @@ paramiko==3.1.0
 PyYAML==6.0
 scipy==1.10.1
 scp==0.14.5
-thunderfish==1.9.10
 tqdm==4.65.0