======================== unified (from filesystem) ========================
                                         'bitrate'  '156.159'
                                        'duration'  '251'
                                          'artist'  'Martha Wainwright'
                                     'text_people'  ''
                                         'release'  'Martha Wainwright [Bonus Track]'
                                           'title'  "Don't Forget"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
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 "'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'canadian', 'female vocalists', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '100.058'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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'TALB' (Album/Movie/Show title)                     'Martha Wainwright [Bonus Track]'
'TBPM' (BPM (beats per minute))                     '100.058'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         "Don't Forget"
'TKEY' (Initial key)                                '12B'
'TLEN' (Length)                                     '251826'
'TPE1' (Lead performer(s)/Soloist(s))               'Martha Wainwright'
'TPE2' (Band/orchestra/accompaniment)               'Martha Wainwright'
'TPUB' (Publisher)                                  'Drowned in Sound'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['indie', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.87 dB'
'TXXX:replaygain_track_peak'                        '0.615359'

========================== row from database ==========================
                                              'id'  1508434
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Martha Wainwright/Martha Wainwright/06 Don_t Forget.mp3
                                         'working'  None
                                         'bitrate'  156
                                    'duration_sec'  251
                                           'genre'  ifs-songwriter
                                        'filesize'  4918486
                                           'mtime'  1623435669
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 06 Don_t ifs songwriter
                                      'tag_artist'  Martha Wainwright
                                     'tag_release'  Martha Wainwright [Bonus Track]
                                       'tag_title'  Don't Forget
                                             'bpm'  100.058
                                    'search_title'  'don':1 'dont':3 'forget':4 't':2
                                   'search_artist'  'martha':1 'wainwright':2
                                  'search_release'  'bonus':3,4 'martha':1 'track':5,6 'wainwright':2
                                     'search_rest'  '00singer':1 'don':4 'eos':3 'ifs':6 'songwriter':2 't':5
                                    'search_combo'  '00singer':13 'bonus':9C,10C 'don':1A,16 'dont':3A 'eos':15 'forget':4A 'ifs':18 'martha':5B,7C 'songwriter':14 't':2A,17 'track':11C,12C 'wainwright':6B,8C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1623435668.7350936  (2021-06-11 20:21:08)
                             'size'  4918486