======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '321'
                                          'artist'  'Bettye LaVette'
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                                     'discogstags'  "['funk / soul', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '12'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '91'
                                             'key'  '8A'
                                        'acoustid'  '30516265-401c-4edf-a767-770d8e5fca21'
rest: ''

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

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'TDOR' (Original release time)                      '2003'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         "It Ain't Worth It After a While"
'TKEY' (Initial key)                                '8A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Bettye LaVette'
'TPE2' (Band/orchestra/accompaniment)               'Bettye LaVette'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'CNR Records International'
'TRCK' (Track number/Position in set)               '8/12'
'TSO2'                                              'LaVette, Bettye'
'TSOP' (Performer sort order)                       'LaVette, Bettye'
'TXXX:Acoustid Id'                                  '30516265-401c-4edf-a767-770d8e5fca21'
'TXXX:Artists'                                      'Bettye LaVette'
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'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['funk / soul', 'soul']
'TXXX:lastfmtags'                                   ['oldies', 'blues', 'female vocalists', 'soul', 'northern soul']
'TXXX:originalyear'                                 '2003'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
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'TXXX:q-play'                                       '2'
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'TXXX:q-vocals'                                     '4'
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========================== row from database ==========================
                                              'id'  1498330
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Bettye Lavette/08 - It Ain_t Worth It After Awhile.mp3
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                                    'duration_sec'  321
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  10383539
                                           'mtime'  1620528220
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                                        'rest_str'   00blues jazz exotica oldies country Lavette 08 Ain_t Awhile prerock jb jazz vocal
                                      'tag_artist'  Bettye LaVette
                                     'tag_release'  A Woman Like Me
                                       'tag_title'  It Ain't Worth It After a While
                                             'bpm'  91.0
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                                  'search_release'  'a':1 'like':3 'me':4 'woman':2
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                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'blues', 'female vocalists', 'soul', 'northern soul']
                                        'tag_date'  2004
                                     'discogstags'  ['funk / soul', 'soul']

============================== file details ==============================
                                           'mtime'  1620528220.139249  (2021-05-09 04:43:40)
                             'size'  10383539