======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '145'
                                          'artist'  'Simon & Garfunkel'
                                     'text_people'  ''
                                         'release'  'The Collection'
                                           'title'  'Peggy-O'
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 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
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                                     'discogstags'  ("['rock', 'pop', 'folk, world, & country', 'folk rock', 'chanson', 'pop "
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '71'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk'
                                             'bpm'  '103.5'
                                             'key'  '2B'
                                        'acoustid'  '37943526-4e2a-4a86-8b19-9cf83fc68c95'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '103.5'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-folk'
'TDOR' (Original release time)                      '2008'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Peggy-O'
'TKEY' (Initial key)                                '2B'
'TMED' (Media type)                                 'Digital Media'
'TPE1' (Lead performer(s)/Soloist(s))               'Simon & Garfunkel'
'TPE2' (Band/orchestra/accompaniment)               'Simon & Garfunkel'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '8/71'
'TSO2'                                              'Simon & Garfunkel'
'TSOP' (Performer sort order)                       'Simon & Garfunkel'
'TSRC' (ISRC (international standard recording code))  'USSM16400210/USSM16401139'
'TXXX:ASIN'                                         'B004LHNSDO'
'TXXX:Acoustid Id'                                  '37943526-4e2a-4a86-8b19-9cf83fc68c95'
'TXXX:MusicBrainz Album Artist Id'                  '5d02f264-e225-41ff-83f7-d9b1f0b1874a'
'TXXX:MusicBrainz Album Id'                         'b532363f-3e0d-40a3-b90c-1643e526f0f4'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '5d02f264-e225-41ff-83f7-d9b1f0b1874a'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock',
 'pop',
 'folk, world, & country',
 'folk rock',
 'chanson',
 'pop rock',
 'country',
 'folk',
 'classic rock']
'TXXX:lastfmtags'                                   ['acoustic', 'rock', 'singer songwriter', 'folk', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.51 dB'
'TXXX:replaygain_track_peak'                        '0.808431'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2a35e530-ab09-49ab-9f10-025643ba2738')

========================== row from database ==========================
                                              'id'  1277801
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Simon & Garfunkel - Simon and Garfunkel/Simon & Garfunkel - Peggy O.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  145
                                           'genre'  ifs-songwriter-folk
                                        'filesize'  2337030
                                           'mtime'  1621699789
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos and ifs songwriter folk
                                      'tag_artist'  Simon & Garfunkel
                                     'tag_release'  The Collection
                                       'tag_title'  Peggy-O
                                             'bpm'  103.5
                                    'search_title'  'o':2 'peggy':1 'peggyo':3
                                   'search_artist'  'garfunkel':2 'simon':1
                                  'search_release'  'collection':2 'the':1
                                     'search_rest'  '00singer':1 'and':4 'eos':3 'folk':6 'ifs':5 'songwriter':2
                                    'search_combo'  '00singer':8 'and':11 'collection':7C 'eos':10 'folk':13 'garfunkel':5B 'ifs':12 'o':2A 'peggy':1A 'peggyo':3A 'simon':4B 'songwriter':9 'the':6C
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['acoustic', 'rock', 'singer songwriter', 'folk', 'classic rock']
                                        'tag_date'  2008
                                     'discogstags'  ['rock', 'pop', 'folk, world, & country', 'folk rock', 'chanson', 'pop rock', 'country', 'folk', 'classic rock']

============================== file details ==============================
                                           'mtime'  1621699789.2834253  (2021-05-22 18:09:49)
                             'size'  2337030