======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '51'
                                          'artist'  'Nils Frahm'
                                     'text_people'  ''
                                         'release'  'The Bells'
                                           'title'  'In the Sky and on the Ground'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
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 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['contemporary classical', 'instrumental', 'piano', 'modern classical', "
 "'ambient']")
                                     'discogstags'  "['classical', 'contemporary']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '11'
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '107'
                                             'key'  '4B'
                                        'acoustid'  '3e254f3a-3d72-49c0-814b-6c744cb657c7'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'The Bells'
'TBPM' (BPM (beats per minute))                     '107'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '2009'
'TDRC' (Recording time)                             '2010-02-01'
'TIT2' (Title/songname/content description)         'In the Sky and on the Ground'
'TKEY' (Initial key)                                '4B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Nils Frahm'
'TPE2' (Band/orchestra/accompaniment)               'Nils Frahm'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Erased Tapes Records'
'TRCK' (Track number/Position in set)               '1/11'
'TSO2'                                              'Frahm, Nils'
'TSOP' (Performer sort order)                       'Frahm, Nils'
'TXXX:Acoustid Id'                                  '3e254f3a-3d72-49c0-814b-6c744cb657c7'
'TXXX:Artists'                                      'Nils Frahm'
'TXXX:CATALOGNUMBER'                                'ERATP021CD'
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'TXXX:MusicBrainz Album Id'                         'd1dc2a35-d7c3-3523-97c6-8e452d483b06'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'd03a54bc-6e07-4c04-a8d4-7fbf2bd07a01'
'TXXX:MusicBrainz Release Group Id'                 '7a26f832-f588-4adc-9ec8-951d2c2111d9'
'TXXX:MusicBrainz Release Track Id'                 'db90bb28-2ab6-3cc2-ad8d-b3787fb1eacd'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['classical', 'contemporary']
'TXXX:lastfmtags'                                   ['contemporary classical',
 'instrumental',
 'piano',
 'modern classical',
 'ambient']
'TXXX:originalyear'                                 '2009'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.44 dB'
'TXXX:replaygain_track_peak'                        '0.888467'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'69577bb1-f8a0-465d-a8ee-78b464f94494')

========================== row from database ==========================
                                              'id'  194882
                                            'path'  /data/Music/Bulk/00instruments-classical/Nils Frahm/2009 - The Bells/01 - In the Sky and on the Ground.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  51
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2116857
                                           'mtime'  1620574206
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 2009 01 prerock classical or classical instruments
                                      'tag_artist'  Nils Frahm
                                     'tag_release'  The Bells
                                       'tag_title'  In the Sky and on the Ground
                                             'bpm'  107.0
                                    'search_title'  'and':4 'ground':6 'in':1 'on':5 'sky':3 'the':2
                                   'search_artist'  'frahm':2 'nils':1
                                  'search_release'  'bells':2 'the':1
                                     'search_rest'  '00instruments':1 '2009':3 'classical':2 'instruments':6 'or':5 'prerock':4
                                    'search_combo'  '00instruments':11 '2009':13 'and':4A 'bells':10C 'classical':12 'frahm':8B 'ground':6A 'in':1A 'instruments':16 'nils':7B 'on':5A 'or':15 'prerock':14 'sky':3A 'the':2A,9C
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['contemporary classical', 'instrumental', 'piano', 'modern classical', 'ambient']
                                        'tag_date'  2010
                                     'discogstags'  ['classical', 'contemporary']

============================== file details ==============================
                                           'mtime'  1620574205.899775  (2021-05-09 17:30:05)
                             'size'  2116857