======================== unified (from filesystem) ========================
                                         'bitrate'  '144.588'
                                        'duration'  '155'
                                          'artist'  'Sister O.M. Terrell'
                                     'text_people'  ''
                                         'release'  'The Slide Guitar: Bottles, Knives & Steel'
                                           'title'  'Swing Low, Chariot'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
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 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'gospel', 'all', 'women', 'mississipi']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  '19'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '87.4'
                                             'key'  '5B'
                                        'acoustid'  'dc1f4f6c-90eb-4399-a8ab-05d8089bcd4a'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:eng'                            'ÜberStandard - UberNet.org'
'COMM:iTunNORM:eng'                                 'ÜberStandard - UberNet.org'
'TALB' (Album/Movie/Show title)                     'The Slide Guitar: Bottles, Knives & Steel'
'TBPM' (BPM (beats per minute))                     '87.4'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDOR' (Original release time)                      '1990'
'TDRC' (Recording time)                             '1990'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'Swing Low, Chariot'
'TKEY' (Initial key)                                '5B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Sister O.M. Terrell'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'CBS'
'TRCK' (Track number/Position in set)               '18/19'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Terrell, Sister O.M.'
'TXXX:ASIN'                                         'B000002752'
'TXXX:Acoustid Id'                                  'dc1f4f6c-90eb-4399-a8ab-05d8089bcd4a'
'TXXX:Artists'                                      'Sister O.M. Terrell'
'TXXX:CATALOGNUMBER'                                '46218'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '1a2745e9-bdd3-44b4-904c-17fb58cc8db2'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '3b6c2f6e-8a7f-4a8f-85cc-4d808d83146b'
'TXXX:MusicBrainz Release Group Id'                 '02460fb2-931b-3a02-beb2-2f1dec5a3f18'
'TXXX:MusicBrainz Release Track Id'                 '57e27639-0c48-3b73-9350-2581399c0684'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['blues', 'gospel', 'all', 'women', 'mississipi']
'TXXX:originalyear'                                 '1990'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.39 dB'
'TXXX:replaygain_track_peak'                        '0.531763'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'b2ea8591-a429-4062-916a-24bc30154535')

========================== row from database ==========================
                                              'id'  1386019
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/slide guitar (1927-1965) - bottles, knives & steel/Sister O.M. Terrell - Swing low, Chariot.mp3
                                         'working'  None
                                         'bitrate'  144
                                    'duration_sec'  155
                                           'genre'  prerock-jb-blues
                                        'filesize'  2856723
                                           'mtime'  1620402821
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country slide guitar (1927 1965) bottles, knives steel low, prerock jb blues
                                      'tag_artist'  Sister O.M. Terrell
                                     'tag_release'  The Slide Guitar: Bottles, Knives & Steel
                                       'tag_title'  Swing Low, Chariot
                                             'bpm'  87.4
                                    'search_title'  'chariot':4 'low':2,3 'swing':1
                                   'search_artist'  'm':3 'o':2 'om':4 'sister':1 'terrell':5
                                  'search_release'  'bottles':5,6 'guitar':3,4 'knives':7 'slide':2 'steel':8 'the':1
                                     'search_rest'  '1927':7,8 '1965':9,10 'blues':19 'bottles':11,12 'country':4 'exotica':2 'guitar':6 'jazz':1 'jb':18 'knives':13 'low':15,16 'oldies':3 'prerock':17 'slide':5 'steel':14
                                    'search_combo'  '1927':24,25 '1965':26,27 'blues':36 'bottles':14C,15C,28,29 'chariot':4A 'country':21 'exotica':19 'guitar':12C,13C,23 'jazz':18 'jb':35 'knives':16C,30 'low':2A,3A,32,33 'm':7B 'o':6B 'oldies':20 'om':8B 'prerock':34 'sister':5B 'slide':11C,22 'steel':17C,31 'swing':1A 'terrell':9B 'the':10C
                                    'tag_tracknum'  18
                                      'num_images'  1
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'gospel', 'all', 'women', 'mississipi']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402821.0662673  (2021-05-07 17:53:41)
                             'size'  2856723