======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '425'
                                          'artist'  'John Coltrane'
                                     'text_people'  ''
                                         'release'  'Blue Train'
                                           'title'  'Lazy Bird'
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                                      'lastfmtags'  "['free jazz', 'avant garde', 'jazz', 'saxophone', 'bebop']"
                                     'discogstags'  "['jazz', 'hard bop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '7'
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-newer-experimental or free'
                                             'bpm'  '123.859'
                                             'key'  '6A'
                                        'acoustid'  '9915b330-e788-448e-bac8-557898ee261b'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Blue Train'
'TBPM' (BPM (beats per minute))                     '123.859'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-newer-experimental or free'
'TDOR' (Original release time)                      '2009'
'TDRC' (Recording time)                             '2009-02-09'
'TIT2' (Title/songname/content description)         'Lazy Bird'
'TKEY' (Initial key)                                '6A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'John Coltrane'
'TPE2' (Band/orchestra/accompaniment)               'John Coltrane'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Not Now Music'
'TRCK' (Track number/Position in set)               '5/7'
'TSO2'                                              'Coltrane, John'
'TSOP' (Performer sort order)                       'Coltrane, John'
'TSST' (Set subtitle)                               'Blue Train / Bonus Tracks from Black Pearls'
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'TXXX:Acoustid Id'                                  '9915b330-e788-448e-bac8-557898ee261b'
'TXXX:Artists'                                      'John Coltrane'
'TXXX:BARCODE'                                      '5060143492914'
'TXXX:CATALOGNUMBER'                                'NOT2CD291'
'TXXX:Mp3gain_minmax'                               '122,186'
'TXXX:Mp3gain_undo'                                 '+001,+001,N'
'TXXX:MusicBrainz Album Artist Id'                  'b625448e-bf4a-41c3-a421-72ad46cdb831'
'TXXX:MusicBrainz Album Id'                         'dae497c8-c9b1-4d30-a386-e667628b41aa'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'b625448e-bf4a-41c3-a421-72ad46cdb831'
'TXXX:MusicBrainz Release Group Id'                 'e18cf812-aa91-47a4-9173-0117e760bdbe'
'TXXX:MusicBrainz Release Track Id'                 '6a30d284-6e3d-39ea-8c27-10509f2c45a7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['jazz', 'hard bop']
'TXXX:lastfmtags'                                   ['free jazz', 'avant garde', 'jazz', 'saxophone', 'bebop']
'TXXX:originalyear'                                 '2009'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.97 dB'
'TXXX:replaygain_track_peak'                        '0.639189'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'f7586e16-3d1a-4e90-bfe7-307039055b8f')

========================== row from database ==========================
                                              'id'  1358956
                                            'path'  /data/Music/Bulk/00poprockelectronic/John Coltrane/Blue Train [1957]/John Coltrane - 05 - Lazy Bird.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  425
                                           'genre'  prerock-jb-jazz-newer-experimental or free
                                        'filesize'  6859497
                                           'mtime'  1620570241
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [1957] 05 prerock jb jazz newer experimental or free
                                      'tag_artist'  John Coltrane
                                     'tag_release'  Blue Train
                                       'tag_title'  Lazy Bird
                                             'bpm'  123.859
                                    'search_title'  'bird':2 'lazy':1
                                   'search_artist'  'coltrane':2 'john':1
                                  'search_release'  'blue':1 'train':2
                                     'search_rest'  '00poprockelectronic':1 '1957':2,3 'experimental':8 'free':10 'jazz':6 'jb':5 'newer':7 'or':9 'prerock':4
                                    'search_combo'  '00poprockelectronic':7 '1957':8,9 'bird':2A 'blue':5C 'coltrane':4B 'experimental':14 'free':16 'jazz':12 'jb':11 'john':3B 'lazy':1A 'newer':13 'or':15 'prerock':10 'train':6C
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['free jazz', 'avant garde', 'jazz', 'saxophone', 'bebop']
                                        'tag_date'  2009
                                     'discogstags'  ['jazz', 'hard bop']

============================== file details ==============================
                                           'mtime'  1620570240.838097  (2021-05-09 16:24:00)
                             'size'  6859497