======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '315'
                                          'artist'  'All Saints'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Never Ever (1998)'
                                           'quals'  ("['Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['90s', 'britpop', 'female vocalists', 'british', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '135.819'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '135.819'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'Never Ever (1998)'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'All Saints'
'TRCK' (Track number/Position in set)               '0'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['90s', 'britpop', 'female vocalists', 'british', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.27 dB'
'TXXX:replaygain_track_peak'                        '0.611306'
'TXXX:tracknum'                                     '101'

========================== row from database ==========================
                                              'id'  1305361
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/101 - All Saints - Never Ever (1998).mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  315
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  4417759
                                           'mtime'  1620566581
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 90s 101 electronic generic or radio unsorted
                                      'tag_artist'  All Saints
                                     'tag_release'  None
                                       'tag_title'  Never Ever (1998)
                                             'bpm'  135.819
                                    'search_title'  '1998':3,4 'ever':2 'never':1
                                   'search_artist'  'all':1 'saints':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '101':3 '90s':2 'electronic':4 'generic':5 'or':6 'radio':7 'unsorted':8
                                    'search_combo'  '00poprockelectronic':7 '101':9 '1998':3A,4A '90s':8 'all':5B 'electronic':10 'ever':2A 'generic':11 'never':1A 'or':12 'radio':13 'saints':6B 'unsorted':14
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['90s', 'britpop', 'female vocalists', 'british', 'pop']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620566580.6746516  (2021-05-09 15:23:00)
                             'size'  4417759