======================== unified (from filesystem) ========================
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                                        'duration'  '274'
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                                      'lastfmtags'  "['indie', 'jazz', 'singer songwriter', 'folk', 'swing']"
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                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk'
                                             'bpm'  '133.491'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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'TBPM' (BPM (beats per minute))                     '133.491'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-folk'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'How Indiscreet'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "Andrew Bird's Bowl of Fire"
'TPUB' (Publisher)                                  'Rykodisc'
'TRCK' (Track number/Position in set)               '12'
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========================== row from database ==========================
                                              'id'  1534353
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Andrew Bird_s Bowl of Fire - Andrew Bird/Andrew Bird's Bowl of Fire/The Swimming Hour/12-how indiscreet.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  274
                                           'genre'  ifs-songwriter-folk
                                        'filesize'  6606357
                                           'mtime'  1636400741
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                                        'rest_str'   00blues jazz exotica oldies country Bird_s 12 how indiscreet ifs songwriter folk
                                      'tag_artist'  Andrew Bird's Bowl of Fire
                                     'tag_release'  The Swimming Hour
                                       'tag_title'  How Indiscreet
                                             'bpm'  133.491
                                    'search_title'  'how':1 'indiscreet':2
                                   'search_artist'  'andrew':1 'bird':2 'birds':4 'bowl':5 'fire':7 'of':6 's':3
                                  'search_release'  'hour':3 'swimming':2 'the':1
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                                    'tag_tracknum'  12
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'jazz', 'singer songwriter', 'folk', 'swing']
                                        'tag_date'  2001
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636400740.8845634  (2021-11-08 20:45:40)
                             'size'  6606357