======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '123'
                                          'artist'  'Fairport Convention'
                                     'text_people'  ''
                                         'release'  'Bbc Radio Sessions 1968-69'
                                           'title'  'Gone, Gone, Gone'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'british folk', 'british', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'ifs-folk-rock'
                                             'bpm'  '142.708'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Bbc Radio Sessions 1968-69'
'TBPM' (BPM (beats per minute))                     '142.708'
'TCON' (Content type, a.k.a. Genre)                 'ifs-folk-rock'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'Gone, Gone, Gone'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Fairport Convention'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['folk rock', 'british folk', 'british', 'folk']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.37 dB'
'TXXX:replaygain_track_peak'                        '0.573956'

========================== row from database ==========================
                                              'id'  1250117
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Fairport Convention/Best of/Fairport Convention - Gone, Gone, Gone.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  123
                                           'genre'  ifs-folk-rock
                                        'filesize'  1976585
                                           'mtime'  1622758069
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Best of ifs folk rock
                                      'tag_artist'  Fairport Convention
                                     'tag_release'  Bbc Radio Sessions 1968-69
                                       'tag_title'  Gone, Gone, Gone
                                             'bpm'  142.708
                                    'search_title'  'gone':1,2
                                   'search_artist'  'convention':2 'fairport':1
                                  'search_release'  '1968':4 '196869':6 '69':5 'bbc':1 'radio':2 'sessions':3
                                     'search_rest'  '00singer':1 'best':4 'eos':3 'folk':7 'ifs':6 'of':5 'rock':8 'songwriter':2
                                    'search_combo'  '00singer':11 '1968':8C '196869':10C '69':9C 'bbc':5C 'best':14 'convention':4B 'eos':13 'fairport':3B 'folk':17 'gone':1A,2A 'ifs':16 'of':15 'radio':6C 'rock':18 'sessions':7C 'songwriter':12
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5B
                                           '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-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['folk rock', 'british folk', 'british', 'folk']
                                        'tag_date'  1969
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622758068.5658164  (2021-06-04 00:07:48)
                             'size'  1976585