diff --git a/code/band_pass_problem.py b/code/band_pass_problem.py
new file mode 100644
index 0000000..fc6a55e
--- /dev/null
+++ b/code/band_pass_problem.py
@@ -0,0 +1,36 @@
+from thunderfish.dataloader import DataLoader as open_data
+from thunderfish.powerspectrum import spectrogram, decibel
+from IPython import embed
+import matplotlib.pyplot as plt
+import numpy as np
+import os
+from scipy.ndimage import gaussian_filter1d
+from modules.filters import bandpass_filter
+from modules.filehandling import LoadData
+
+
+def main(folder):
+    data = LoadData(folder)
+
+    t0 = 3*60*60 + 6*60 + 43.5
+    dt = 60
+    data_oi = data.raw[t0 * data.raw_rate: (t0+dt)*data.raw_rate, :]
+    # good electrode 
+    electrode = 10 
+    data_oi = data_oi[:, electrode]
+    fig, axs = plt.subplots(2,1)
+    axs[0].plot( np.arange(data_oi.shape[0]) / data.raw_rate, data_oi)
+    for tr, track_id in enumerate(np.unique(data.ident[~np.isnan(data.ident)])):
+        rack_window_index = np.arange(len(data.idx))[
+                (data.ident == track_id) &
+                                        (data.time[data.idx] >= t0) &
+                                        (data.time[data.idx] <= (t0+dt))]
+        freq_fish = data.freq[rack_window_index]
+        axs[1].plot(np.arange(freq_fish.shape[0]) / data.raw_rate, freq_fish)
+
+    plt.show()
+
+
+
+if __name__ == '__main__':
+    main('/Users/acfw/Documents/uni_tuebingen/chirpdetection/GP2023_chirp_detection/data/2022-06-02-10_00/')
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