diff --git a/wfdb/io/convert/edf.py b/wfdb/io/convert/edf.py
index 27bd566..32a3b19 100644
--- a/wfdb/io/convert/edf.py
+++ b/wfdb/io/convert/edf.py
@@ -411,9 +411,7 @@ def read_edf(
         else:
             temp_sig_data = temp_all_sigs[i].flatten()
             if samps_per_frame[i] == 1:
-                sig_data[:, i] = (
-                    temp_sig_data - baseline[i]
-                ) / adc_gain_all[i]
+                sig_data[:, i] = (temp_sig_data - baseline[i]) / adc_gain_all[i]
             else:
                 for j in range(sig_len):
                     start_ind = j * samps_per_frame[i]