======================== unified (from filesystem) ========================
                                         'bitrate'  '244.986'
                                        'duration'  '149'
                                          'artist'  'Nick Drake'
                                     'text_people'  'Nick Drake'
                                         'release'  'Five Leaves Left'
                                           'title'  'Day Is Done'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-2', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']"
                                     'discogstags'  "['rock', 'folk rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '129.068'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Five Leaves Left'
'TBPM' (BPM (beats per minute))                     '129.068'
'TCOM' (Composer)                                   'Nick Drake'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'Day Is Done'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nick Drake'
'TPE2' (Band/orchestra/accompaniment)               'Nick Drake'
'TPUB' (Publisher)                                  'Island'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'folk rock']
'TXXX:lastfmtags'                                   ['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.45 dB'
'TXXX:replaygain_track_peak'                        '0.645675'

========================== row from database ==========================
                                              'id'  1315510
                                            'path'  /data/Music/Bulk/00poprockelectronic/Nick Drake/Five Leaves Left/05 - Day is Done - Nick Drake.mp3
                                         'working'  None
                                         'bitrate'  245
                                    'duration_sec'  149
                                           'genre'  ifs-songwriter
                                        'filesize'  4584597
                                           'mtime'  1623435832
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 05 is ifs songwriter
                                      'tag_artist'  Nick Drake
                                     'tag_release'  Five Leaves Left
                                       'tag_title'  Day Is Done
                                             'bpm'  129.068
                                    'search_title'  'day':1 'done':3 'is':2
                                   'search_artist'  'drake':2 'nick':1
                                  'search_release'  'five':1 'leaves':2 'left':3
                                     'search_rest'  '00poprockelectronic':1 'ifs':3 'is':2 'songwriter':4
                                    'search_combo'  '00poprockelectronic':9 'day':1A 'done':3A 'drake':5B 'five':6C 'ifs':11 'is':2A,10 'leaves':7C 'left':8C 'nick':4B 'songwriter':12
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']
                                        'tag_date'  1969
                                     'discogstags'  ['rock', 'folk rock']

============================== file details ==============================
                                           'mtime'  1623435832.2217214  (2021-06-11 20:23:52)
                             'size'  4584597