======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '246'
                                          'artist'  'Therion'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['death metal', 'progressive metal', 'symphonic metal', 'metal', 'gothic "
 "metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '145.895'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Therion'
'TXXX:Mp3gain_minmax'                               '131,183'
'TXXX:Mp3gain_undo'                                 '+005,+005,N'
'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'
'TXXX:lastfmtags'                                   ['death metal', 'progressive metal', 'symphonic metal', 'metal', 'gothic metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.64 dB'
'TXXX:replaygain_track_peak'                        '0.442118'

========================== row from database ==========================
                                              'id'  1297199
                                            'path'  /data/Music/Bulk/00poprockelectronic/Therion/Crowning of Atlantis/Therion - The Beauty In Black (Prec. By Arrival of Darkest Queen).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  246
                                           'genre'  eid-metal
                                        'filesize'  3939075
                                           'mtime'  1620301826
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Crowning of Atlantis Beauty In Black (Prec. By Arrival of Darkest Queen) eid metal
                                      'tag_artist'  Therion
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  145.895
                                    'search_title'  None
                                   'search_artist'  'therion':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'arrival':11 'atlantis':4 'beauty':5 'black':7 'by':10 'crowning':2 'darkest':12 'eid':15 'in':6 'metal':16 'of':3 'prec':8,9 'queen':13,14
                                    'search_combo'  '00poprockelectronic':2 'arrival':12 'atlantis':5 'beauty':6 'black':8 'by':11 'crowning':3 'darkest':13 'eid':16 'in':7 'metal':17 'of':4 'prec':9,10 'queen':14,15 'therion':1B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['death metal', 'progressive metal', 'symphonic metal', 'metal', 'gothic metal']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301825.6536536  (2021-05-06 13:50:25)
                             'size'  3939075