======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '537'
                                          'artist'  'Thin Lizzy'
                                     'text_people'  ''
                                         'release'  'Life (disc 2)'
                                           'title'  'Still In Love With You'
                                           'quals'  ("['Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-4', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-2']")
                                      'lastfmtags'  "['heavy metal', 'rock', 'hard rock', 'irish', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '116.655'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Life (disc 2)'
'TBPM' (BPM (beats per minute))                     '116.655'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'Still In Love With You'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Thin Lizzy'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['heavy metal', 'rock', 'hard rock', 'irish', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.97 dB'
'TXXX:replaygain_track_peak'                        '0.480371'

========================== row from database ==========================
                                              'id'  1418493
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Thin Lizzy/MBZ;#Thin Lizzy;#Life (disc 2);#08;#Still In Love With You.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  537
                                           'genre'  rock-unsorted
                                        'filesize'  8609317
                                           'mtime'  1620387846
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy MBZ;#Thin Lizzy;#Life 2);#08;#Still rock unsorted
                                      'tag_artist'  Thin Lizzy
                                     'tag_release'  Life (disc 2)
                                       'tag_title'  Still In Love With You
                                             'bpm'  116.655
                                    'search_title'  'in':2 'love':3 'still':1 'with':4 'you':5
                                   'search_artist'  'lizzy':2 'thin':1
                                  'search_release'  '2':4,5 'disc':2,3 'life':1
                                     'search_rest'  '08':11,14 '2':10,13 'classicprogpsy':1 'life':7,9 'lizzy':6,8 'mbz':2,4 'rock':16 'still':12,15 'thin':3,5 'unsorted':17
                                    'search_combo'  '08':23,26 '2':11C,12C,22,25 'classicprogpsy':13 'disc':9C,10C 'in':2A 'life':8C,19,21 'lizzy':7B,18,20 'love':3A 'mbz':14,16 'rock':28 'still':1A,24,27 'thin':6B,15,17 'unsorted':29 'with':4A 'you':5A
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['heavy metal', 'rock', 'hard rock', 'irish', 'classic rock']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620387846.2411764  (2021-05-07 13:44:06)
                             'size'  8609317