======================== unified (from filesystem) ========================
                                         'bitrate'  '248.83'
                                        'duration'  '171'
                                          'artist'  'Ohio Players'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Rollercoaster'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-JZFKS-3', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['disco', 'rhythm and blues', 'soul', 'funk', '70s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '116.789'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.789'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         'Rollercoaster'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ohio Players'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['disco', 'rhythm and blues', 'soul', 'funk', '70s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.13 dB'
'TXXX:replaygain_track_peak'                        '0.251933'

========================== row from database ==========================
                                              'id'  1214590
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Soul/Ohio Players - Rollercoaster.mp3
                                         'working'  None
                                         'bitrate'  248
                                    'duration_sec'  171
                                           'genre'  funk or soul
                                        'filesize'  5342374
                                           'mtime'  1628357770
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Soul funk or soul
                                      'tag_artist'  Ohio Players
                                     'tag_release'  None
                                       'tag_title'  Rollercoaster
                                             'bpm'  116.789
                                    'search_title'  'rollercoaster':1
                                   'search_artist'  'ohio':1 'players':2
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'funk':6 'jazz':1 'oldies':3 'or':7 'soul':5
                                    'search_combo'  'country':7 'exotica':5 'funk':9 'jazz':4 'ohio':2B 'oldies':6 'or':10 'players':3B 'rollercoaster':1A 'soul':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['disco', 'rhythm and blues', 'soul', 'funk', '70s']
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357770.1718733  (2021-08-07 19:36:10)
                             'size'  5342374