======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '472'
                                          'artist'  'Joni Mitchell'
                                     'text_people'  'Joni Mitchell'
                                         'release'  'Big Yellow Taxi'
                                           'title'  'Big Yellow Taxi [N.Y. Cab to Club Mix]'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-3', "
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                                      'lastfmtags'  "['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']"
                                     'discogstags'  "['electronic', 'folk, world, & country', 'house', 'trip hop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk;ifs-songwriter-eos'
                                             'bpm'  '126.410'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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'TALB' (Album/Movie/Show title)                     'Big Yellow Taxi'
'TBPM' (BPM (beats per minute))                     '126.410'
'TCOM' (Composer)                                   'Joni Mitchell'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-folk', 'ifs-songwriter-eos']
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'Big Yellow Taxi [N.Y. Cab to Club Mix]'
'TKEY' (Initial key)                                '12A'
'TLEN' (Length)                                     '473133'
'TPE1' (Lead performer(s)/Soloist(s))               'Joni Mitchell'
'TPE2' (Band/orchestra/accompaniment)               'Joni Mitchell'
'TPUB' (Publisher)                                  'Reprise'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'folk, world, & country', 'house', 'trip hop']
'TXXX:lastfmtags'                                   ['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.17 dB'
'TXXX:replaygain_track_peak'                        '0.524240'

========================== row from database ==========================
                                              'id'  194524
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Joni Mitchell/1996 - Big Yellow Taxi/04 big yellow taxi [n.y. cab to club mix].mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  472
                                           'genre'  ifs-songwriter-folk;ifs-songwriter-eos
                                        'filesize'  18913280
                                           'mtime'  1636400352
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 1996 04 big yellow taxi [n.y. cab club mix] ifs songwriter folk;ifs songwriter eos
                                      'tag_artist'  Joni Mitchell
                                     'tag_release'  Big Yellow Taxi
                                       'tag_title'  Big Yellow Taxi [N.Y. Cab to Club Mix]
                                             'bpm'  126.41
                                    'search_title'  'big':1 'cab':7 'club':9 'mix':10,11 'n':4 'ny':6 'taxi':3 'to':8 'y':5 'yellow':2
                                   'search_artist'  'joni':1 'mitchell':2
                                  'search_release'  'big':1 'taxi':3 'yellow':2
                                     'search_rest'  '00singer':1 '1996':4 'big':5 'cab':11 'club':12 'eos':3 'folk':16,18 'ifs':15,17,19 'mix':13,14 'n':8 'ny':10 'songwriter':2 'taxi':7 'y':9 'yellow':6
                                    'search_combo'  '00singer':17 '1996':20 'big':1A,14C,21 'cab':7A,27 'club':9A,28 'eos':19 'folk':32,34 'ifs':31,33,35 'joni':12B 'mitchell':13B 'mix':10A,11A,29,30 'n':4A,24 'ny':6A,26 'songwriter':18 'taxi':3A,16C,23 'to':8A 'y':5A,25 'yellow':2A,15C,22
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-1', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
                                        'tag_date'  1996
                                     'discogstags'  ['electronic', 'folk, world, & country', 'house', 'trip hop']

============================== file details ==============================
                                           'mtime'  1636400352.175306  (2021-11-08 20:39:12)
                             'size'  18913280