======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '214'
                                          'artist'  'Babylon Whores'
                                     'text_people'  ''
                                         'release'  'Born in Fire, Volume 2'
                                           'title'  'Errata Stigmata'
                                           'quals'  ("['Q-HAP-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-OLDST-3', 'q-syn-2', "
 "'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-3', "
 "'q-other-3', 'q-piano-1', 'q-vocals-2', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['death rock', 'heavy metal', 'metal', 'finnish', 'rock']"
                                     'discogstags'  "['rock', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '17'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '100.455'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Born in Fire, Volume 2'
'TBPM' (BPM (beats per minute))                     '100.455'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TIT2' (Title/songname/content description)         'Errata Stigmata'
'TKEY' (Initial key)                                '10A'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Babylon Whores'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '3/17'
'TSOP' (Performer sort order)                       'Babylon Whores'
'TXXX:ALBUMARTISTSORT'                              'Various Artists'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         'bbe89cd8-4bf0-40ea-b78b-5167debca785'
'TXXX:MusicBrainz Album Status'                     'promotion'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'cd963433-3459-4fc8-9a1c-b0d3d40f05c7'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'heavy metal']
'TXXX:lastfmtags'                                   ['death rock', 'heavy metal', 'metal', 'finnish', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '-2.09 dB'
'TXXX:replaygain_track_peak'                        '0.382521'

========================== row from database ==========================
                                              'id'  1359954
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Babylon Whores - Errata Stigmata - Born in Fire, Volume 2.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  214
                                           'genre'  eid-unsorted
                                        'filesize'  3432901
                                           'mtime'  1620521380
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] eid unsorted
                                      'tag_artist'  Babylon Whores
                                     'tag_release'  Born in Fire, Volume 2
                                       'tag_title'  Errata Stigmata
                                             'bpm'  100.455
                                    'search_title'  'errata':1 'stigmata':2
                                   'search_artist'  'babylon':1 'whores':2
                                  'search_release'  '2':6 'born':1 'fire':3,4 'in':2 'volume':5
                                     'search_rest'  '00poprockelectronic':1 'eid':7 'files':5,6 'loose':3,4 'unsorted':2
                                    'search_combo'  '00poprockelectronic':11 '2':10C 'babylon':3B 'born':5C 'eid':17 'errata':1A 'files':15,16 'fire':7C,8C 'in':6C 'loose':13,14 'stigmata':2A 'unsorted':12 'volume':9C 'whores':4B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  10A
                                           '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-2', 'q-other-3', 'Q-HAP-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['death rock', 'heavy metal', 'metal', 'finnish', 'rock']
                                        'tag_date'  
                                     'discogstags'  ['rock', 'heavy metal']

============================== file details ==============================
                                           'mtime'  1620521380.3942478  (2021-05-09 02:49:40)
                             'size'  3432901