======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '142'
                                          'artist'  'The Swinging Blue Jeans'
                                     'text_people'  ''
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                                           'title'  'Big City'
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                                      'lastfmtags'  "['rock and roll', 'british', 'oldies', '60s', 'merseybeat']"
                                     'discogstags'  "['beat', 'rock', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '28'
                                      'tracktotal'  '31'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '146.000'
                                             'key'  '11B'
                                        'acoustid'  '0d05b7f3-9a6f-4f61-a87b-0acb2e64d7f9'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '146.000'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'Big City'
'TKEY' (Initial key)                                '11B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Swinging Blue Jeans'
'TPE2' (Band/orchestra/accompaniment)               'The Swinging Blue Jeans'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Rock in Beat Records'
'TRCK' (Track number/Position in set)               '28/31'
'TSO2'                                              'Swinging Blue Jeans, The'
'TSOP' (Performer sort order)                       'Swinging Blue Jeans, The'
'TXXX:Acoustid Id'                                  '0d05b7f3-9a6f-4f61-a87b-0acb2e64d7f9'
'TXXX:Artists'                                      'The Swinging Blue Jeans'
'TXXX:CATALOGNUMBER'                                'RB 030'
'TXXX:MusicBrainz Album Artist Id'                  'f200e1a5-43c6-42e1-a715-d9742d6559ef'
'TXXX:MusicBrainz Album Id'                         '79f1c350-581b-49b6-bd4d-dac597126c82'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'f200e1a5-43c6-42e1-a715-d9742d6559ef'
'TXXX:MusicBrainz Release Group Id'                 '06bc50fa-d690-4179-8acf-46a92bcdbff2'
'TXXX:MusicBrainz Release Track Id'                 'a9ddb59e-ea2c-49f9-816f-f7f8525d7ca7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['beat', 'rock', 'pop']
'TXXX:lastfmtags'                                   ['rock and roll', 'british', 'oldies', '60s', 'merseybeat']
'TXXX:originalyear'                                 '1998'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.31 dB'
'TXXX:replaygain_track_peak'                        '0.364161'
'TXXX:tracknum'                                     '28'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'671362e9-f1a0-4553-90ee-06c27d4e4f49')

========================== row from database ==========================
                                              'id'  1528156
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/the swinging blue jeans - don_t make me over/28 Big City.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  142
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  3510852
                                           'mtime'  1621852611
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country the swinging blue jeans don_t make me over 28 rock pop early rocknroll
                                      'tag_artist'  The Swinging Blue Jeans
                                     'tag_release'  Don't Make Me Over
                                       'tag_title'  Big City
                                             'bpm'  146.0
                                    'search_title'  'big':1 'city':2
                                   'search_artist'  'blue':3 'jeans':4 'swinging':2 'the':1
                                  'search_release'  'don':1 'dont':3 'make':4 'me':5 'over':6 't':2
                                     'search_rest'  '28':14 'blue':7 'country':4 'don':9 'early':17 'exotica':2 'jazz':1 'jeans':8 'make':11 'me':12 'oldies':3 'over':13 'pop':16 'rock':15 'rocknroll':18 'swinging':6 't':10 'the':5
                                    'search_combo'  '28':26 'big':1A 'blue':5B,19 'city':2A 'country':16 'don':7C,21 'dont':9C 'early':29 'exotica':14 'jazz':13 'jeans':6B,20 'make':10C,23 'me':11C,24 'oldies':15 'over':12C,25 'pop':28 'rock':27 'rocknroll':30 'swinging':4B,18 't':8C,22 'the':3B,17
                                    'tag_tracknum'  28
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'british', 'oldies', '60s', 'merseybeat']
                                        'tag_date'  1998
                                     'discogstags'  ['beat', 'rock', 'pop']

============================== file details ==============================
                                           'mtime'  1621852610.9103673  (2021-05-24 12:36:50)
                             'size'  3510852