======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '129'
                                          'artist'  'Maggie Estep'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'm An Emotional Idiot"
                                           'quals'  "['q-bass-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '90.1'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TBPM' (BPM (beats per minute))                     '90.1'
'TIT2' (Title/songname/content description)         "I'm An Emotional Idiot"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Maggie Estep'
'TRCK' (Track number/Position in set)               '0'
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.37 dB'
'TXXX:replaygain_track_peak'                        '0.508917'

========================== row from database ==========================
                                              'id'  1538356
                                            'path'  /data/Music/Other/PrevSet/[9odd]/Maggie Estep/i'm an emotional idiot.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  129
                                           'genre'  
                                        'filesize'  2078441
                                           'mtime'  1662800536
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9odd] i'm an emotional idiot
                                      'tag_artist'  Maggie Estep
                                     'tag_release'  None
                                       'tag_title'  I'm An Emotional Idiot
                                             'bpm'  90.1
                                    'search_title'  'an':4 'emotional':5 'i':1 'idiot':6 'im':3 'm':2
                                   'search_artist'  'estep':2 'maggie':1
                                  'search_release'  
                                     'search_rest'  '9odd':2,3 'an':7 'emotional':8 'i':4 'idiot':9 'im':6 'm':5 'prev':10 'prevset':1 'set':11
                                    'search_combo'  '9odd':10,11 'an':4A,15 'emotional':5A,16 'estep':8B 'i':1A,12 'idiot':6A,17 'im':3A,14 'm':2A,13 'maggie':7B 'prev':18 'prevset':9 'set':19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['q-bass-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800535.5693252  (2022-09-10 11:02:15)
                             'size'  2078441