======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '174'
                                          'artist'  'Paul Robeson'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'Sometimes I Feel Like a Motherless Child'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', 'q-chart-2', "
 "'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['american', 'blues', 'spiritual', 'folk', 'gospel']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '18'
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '142.307'
                                             'key'  '2B'
                                        'acoustid'  '6c8651c0-92b0-442f-9b46-8a7f7e98aac2'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '142.307'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Sometimes I Feel Like a Motherless Child'
'TKEY' (Initial key)                                '2B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Robeson'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Frémeaux & Associés'
'TRCK' (Track number/Position in set)               '15/18'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Robeson, Paul'
'TXXX:ASIN'                                         'B003FH3MOG'
'TXXX:Acoustid Id'                                  '6c8651c0-92b0-442f-9b46-8a7f7e98aac2'
'TXXX:BARCODE'                                      '3448960216821'
'TXXX:CATALOGNUMBER'                                'FA 168'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '4078d535-9916-47a0-95e8-8c1e07172b79'
'TXXX:MusicBrainz Album Release Country'            'FR'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'bbc5febe-0321-4bb2-adcd-8dafbf8d8841'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['american', 'blues', 'spiritual', 'folk', 'gospel']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.06 dB'
'TXXX:replaygain_track_peak'                        '0.467823'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'8c9e6883-2b78-4953-a69e-0fcd3e21d515')

========================== row from database ==========================
                                              'id'  1150077
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Paul Robeson - A Motherless Child.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  174
                                           'genre'  prerock-unsorted
                                        'filesize'  2813952
                                           'mtime'  1620385501
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s A prerock unsorted
                                      'tag_artist'  Paul Robeson
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Sometimes I Feel Like a Motherless Child
                                             'bpm'  142.307
                                    'search_title'  'a':5 'child':7 'feel':3 'i':2 'like':4 'motherless':6 'sometimes':1
                                   'search_artist'  'paul':1 'robeson':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'a':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':18 '1920s':19 '1930s':20 '20s':10C '30s':12C 'a':5A,21 'and':11C 'child':7A 'country':17 'exotica':15 'feel':3A 'i':2A 'jazz':14 'like':4A 'motherless':6A 'oldies':16 'paul':8B 'popular':13C 'prerock':22 'robeson':9B 'sometimes':1A 'unsorted':23
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['american', 'blues', 'spiritual', 'folk', 'gospel']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385501.453682  (2021-05-07 13:05:01)
                             'size'  2813952