======================== unified (from filesystem) ========================
                                         'bitrate'  '165.139'
                                        'duration'  '182'
                                          'artist'  'Fairport Convention'
                                     'text_people'  ''
                                         'release'  'The History Of Fairport Convention'
                                           'title'  'Fotheringay'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'british folk', 'british', 'folk']"
                                     'discogstags'  "['rock', 'folk rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '18'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'ifs-folk-rock'
                                             'bpm'  '84.667'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             '09123112'
'COMM:ID3v1 Comment:XXX'                            '09123112'
'TALB' (Album/Movie/Show title)                     'The History Of Fairport Convention'
'TBPM' (BPM (beats per minute))                     '84.667'
'TCON' (Content type, a.k.a. Genre)                 'ifs-folk-rock'
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         'Fotheringay'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Fairport Convention'
'TRCK' (Track number/Position in set)               '2/18'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.92, VBR 3, Stereo, High quality'
'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:discogstags'                                  ['rock', 'folk rock']
'TXXX:lastfmtags'                                   ['folk rock', 'british folk', 'british', 'folk']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.736216'

========================== row from database ==========================
                                              'id'  1273731
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Fairport Convention/Best of/Fairport Convention - 01 - Fotheringay.mp3
                                         'working'  None
                                         'bitrate'  165
                                    'duration_sec'  182
                                           'genre'  ifs-folk-rock
                                        'filesize'  3767451
                                           'mtime'  1622758066
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Best of 01 ifs folk rock
                                      'tag_artist'  Fairport Convention
                                     'tag_release'  The History Of Fairport Convention
                                       'tag_title'  Fotheringay
                                             'bpm'  84.667
                                    'search_title'  'fotheringay':1
                                   'search_artist'  'convention':2 'fairport':1
                                  'search_release'  'convention':5 'fairport':4 'history':2 'of':3 'the':1
                                     'search_rest'  '00singer':1 'best':4 'eos':3 'folk':7 'ifs':6 'of':5 'rock':8 'songwriter':2
                                    'search_combo'  '00singer':9 'best':12 'convention':3B,8C 'eos':11 'fairport':2B,7C 'folk':15 'fotheringay':1A 'history':5C 'ifs':14 'of':6C,13 'rock':16 'songwriter':10 'the':4C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['folk rock', 'british folk', 'british', 'folk']
                                        'tag_date'  1989
                                     'discogstags'  ['rock', 'folk rock']

============================== file details ==============================
                                           'mtime'  1622758065.5841143  (2021-06-04 00:07:45)
                             'size'  3767451