old_contents: import numpy as np
  import scipy.signal
  
  refs_dict = {
      'tachibana': {
          'nperseg': 256,
          'noverlap': 192,
          'window': 'Hann',  # Hann window
          'freq_cutoffs': [10, 15990],  # basically no bandpass, as in Tachibana
          'filter_func': 'diff',
          'spect_func': 'mpl',
          'log_transform_spect': False,  # see tachibana feature docs
          'thresh': None
      },
  
      'koumura': {
          'nperseg': 512,
          'noverlap': 480,
          'window': 'dpss',
          'freq_cutoffs': [1000, 8000],
          'filter_func': None,
          'spect_func': 'scipy',
          'log_transform_spect': True,
          'thresh': None
      }
  }
  
new_contents: import numpy as np
  import scipy.signal
  
  refs_dict = {
      'tachibana': {
          'nperseg': 256,
          'noverlap': 192,
          'window': 'Hann',  # Hann window
          'freq_cutoffs': [10, 15990],  # basically no bandpass, as in Tachibana
          'filter_func': 'diff',
          'spect_func': 'mpl',
          'log_transform_spect': False,  # see tachibana feature docs
          'thresh': None
      },
  
      'koumura': {
          'nperseg': 512,
          'noverlap': 480,
          'window': 'dpss',
          'freq_cutoffs': [1000, 8000],
          'filter_func': None,
          'spect_func': 'scipy',
          'log_transform_spect': True,
          'thresh': None
      },
  
      'evsonganaly': {
          'nperseg': 512,
          'noverlap': 409,
          'window': 'hann',
          'freq_cutoffs': [500, 10000],
          'filter_func': None,
          'spect_func': 'mpl',
          'log_transform_spect': False,
          'thresh': None
      }
  }
  
subject: add `evsonganaly` to `refs_dict` in ref_spect_params.py