======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '244'
                                          'artist'  'In Flames'
                                     'text_people'  'Jesper Strvmblad/Mikael Stanne'
                                         'release'  'Lunar Strain/Subterranean'
                                           'title'  'Lunar Strain'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swedish', 'death metal', 'melodic death metal', 'metal', 'swedish metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-metal-death;eid-metal-melodic'
                                             'bpm'  '113.708'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Lunar Strain/Subterranean'
'TBPM' (BPM (beats per minute))                     '113.708'
'TCOM' (Composer)                                   'Jesper Strvmblad/Mikael Stanne'
'TCON' (Content type, a.k.a. Genre)                 ['eid-metal-death', 'eid-metal-melodic']
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Lunar Strain'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'In Flames'
'TRCK' (Track number/Position in set)               '2'
'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'                                   ['swedish', 'death metal', 'melodic death metal', 'metal', 'swedish metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.39 dB'
'TXXX:replaygain_track_peak'                        '0.422872'

========================== row from database ==========================
                                              'id'  1394967
                                            'path'  /data/Music/Bulk/00dwimp/00metal/In Flames/Lunar Strain_Subterranean/In Flames-Lunar Strain-Subterranean-Lunar Strain.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  244
                                           'genre'  eid-metal-death;eid-metal-melodic
                                        'filesize'  5877890
                                           'mtime'  1620301988
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal Strain_Subterranean eid metal death;eid metal melodic
                                      'tag_artist'  In Flames
                                     'tag_release'  Lunar Strain/Subterranean
                                       'tag_title'  Lunar Strain
                                             'bpm'  113.708
                                    'search_title'  'lunar':1 'strain':2
                                   'search_artist'  'flames':2 'in':1
                                  'search_release'  'lunar':1 'strain':2 'strainsubterranean':4 'subterranean':3
                                     'search_rest'  '00dwimp':1 '00metal':2 'death':7,9 'eid':5,8,10 'melodic':11 'metal':6 'strain':3 'subterranean':4
                                    'search_combo'  '00dwimp':9 '00metal':10 'death':15,17 'eid':13,16,18 'flames':4B 'in':3B 'lunar':1A,5C 'melodic':19 'metal':14 'strain':2A,6C,11 'strainsubterranean':8C 'subterranean':7C,12
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['swedish', 'death metal', 'melodic death metal', 'metal', 'swedish metal']
                                        'tag_date'  2000
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301987.892088  (2021-05-06 13:53:07)
                             'size'  5877890