======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '152'
                                          'artist'  'Johnny Bond'
                                     'text_people'  ''
                                         'release'  'The History of Country & Western Music Vol.11'
                                           'title'  'Tomorrow Never Comes'
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                                      'lastfmtags'  "['classic country', 'country', 'honky tonk', 'rockabilly', 'rock n roll']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '20'
                                            'date'  '1946'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '106.4'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '106.4'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1946'
'TENC' (Encoded by)                                 'iTunes 10.6.3'
'TIT2' (Title/songname/content description)         'Tomorrow Never Comes'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Bond'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '11/20'
'TRCK' (Track number/Position in set)               '10/20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['classic country', 'country', 'honky tonk', 'rockabilly', 'rock n roll']
'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'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.27 dB'
'TXXX:replaygain_track_peak'                        '0.523613'

========================== row from database ==========================
                                              'id'  679671
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Vol 11/10. Johnny Bond - Tomorrow Never Comes.mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  152
                                           'genre'  loc-namerica-country
                                        'filesize'  1219360
                                           'mtime'  1621628455
                                   'redo_metaread'  0
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                                     'tag_release'  The History of Country & Western Music Vol.11
                                       'tag_title'  Tomorrow Never Comes
                                             'bpm'  106.4
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                                   'search_artist'  'bond':2 'johnny':1
                                  'search_release'  '11':8 'country':4 'history':2 'music':6 'of':3 'the':1 'vol':7 'vol11':9 'western':5
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                                    'search_combo'  '10':19,20 '11':13C 'bond':5B 'comes':3A 'country':9C,18 'exotica':16 'history':7C 'jazz':15 'johnny':4B 'loc':21 'music':11C 'namerica':22 'never':2A 'of':8C 'oldies':17 'the':6C 'tomorrow':1A 'vol':12C 'vol11':14C 'western':10C
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic country', 'country', 'honky tonk', 'rockabilly', 'rock n roll']
                                        'tag_date'  1946
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628454.8171191  (2021-05-21 22:20:54)
                             'size'  1219360