======================== unified (from filesystem) ========================
                                         'bitrate'  '196.424'
                                        'duration'  '425'
                                          'artist'  'Preservation Hall Jazz Band'
                                     'text_people'  ''
                                         'release'  'Greetings from New Orleans'
                                           'title'  'St. Louis Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new orleans', 'jazz', 'jazz or blues', 'dixieland', 'jazz band']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '14'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-dixiestyle'
                                             'bpm'  '86.327'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greetings from New Orleans'
'TBPM' (BPM (beats per minute))                     '86.327'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-dixiestyle'
'TIT2' (Title/songname/content description)         'St. Louis Blues'
'TKEY' (Initial key)                                '7B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Preservation Hall Jazz Band'
'TPE2' (Band/orchestra/accompaniment)               'Preservation Hall Jazz Band'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '5/14'
'TSO2'                                              'Preservation Hall Jazz Band'
'TSOP' (Performer sort order)                       'Preservation Hall Jazz Band'
'TXXX:BARCODE'                                      '4011778013457'
'TXXX:MusicBrainz Album Artist Id'                  '1a9b4e0d-05e2-4491-83f0-a4a676283f99'
'TXXX:MusicBrainz Album Id'                         '97ae33b2-a0ef-4c30-a308-8ab443e6979d'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '1a9b4e0d-05e2-4491-83f0-a4a676283f99'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['new orleans', 'jazz', 'jazz or blues', 'dixieland', 'jazz band']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.83 dB'
'TXXX:replaygain_track_peak'                        '0.713868'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'6f1ccba4-61b8-439f-af96-7051ed6338ff')

========================== row from database ==========================
                                              'id'  672737
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Preservation Hall/Preservation Hall Jazz Band@Greetings From New Orleans@@05@St. Louis Blues.mp3
                                         'working'  None
                                         'bitrate'  196
                                    'duration_sec'  425
                                           'genre'  prerock-jb-jazz-o-dixiestyle
                                        'filesize'  10455098
                                           'mtime'  1620533937
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Band@Greetings From Orleans@@05@St. prerock jb jazz dixiestyle
                                      'tag_artist'  Preservation Hall Jazz Band
                                     'tag_release'  Greetings from New Orleans
                                       'tag_title'  St. Louis Blues
                                             'bpm'  86.327
                                    'search_title'  'blues':4 'louis':3 'st':1,2
                                   'search_artist'  'band':4 'hall':2 'jazz':3 'preservation':1
                                  'search_release'  'from':2 'greetings':1 'new':3 'orleans':4
                                     'search_rest'  '05':9,12 'band':5 'country':4 'dixiestyle':16 'exotica':2 'from':7 'greetings':6 'jazz':1 'jb':15 'oldies':3 'orleans':8,11 'prerock':14 'st':10,13
                                    'search_combo'  '05':21,24 'band':8B,17 'blues':4A 'country':16 'dixiestyle':28 'exotica':14 'from':10C,19 'greetings':9C,18 'hall':6B 'jazz':7B,13 'jb':27 'louis':3A 'new':11C 'oldies':15 'orleans':12C,20,23 'prerock':26 'preservation':5B 'st':1A,2A,22,25
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['new orleans', 'jazz', 'jazz or blues', 'dixieland', 'jazz band']
                                        'tag_date'  
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620533937.4209614  (2021-05-09 06:18:57)
                             'size'  10455098