======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '247'
                                          'artist'  'Styx'
                                     'text_people'  ''
                                         'release'  'The Best of Styx'
                                           'title'  'Blue Collar Man'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['80s', 'hard rock', 'rock', 'progressive rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '126.174'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best of Styx'
'TBPM' (BPM (beats per minute))                     '126.174'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Blue Collar Man'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Styx'
'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'                                   ['80s', 'hard rock', 'rock', 'progressive rock', 'classic rock']
'TXXX:original release date'                        ['2004', '2004']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.19 dB'
'TXXX:replaygain_track_peak'                        '0.440918'
'TXXX:tracknum'                                     '03'

========================== row from database ==========================
                                              'id'  1414377
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Greatest Hits - Styx/The Best of Styx/03 Blue Collar Man.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  247
                                           'genre'  rock-cppex-progressive
                                        'filesize'  5947307
                                           'mtime'  1620736177
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy Greatest Hits 03 rock cppex progressive
                                      'tag_artist'  Styx
                                     'tag_release'  The Best of Styx
                                       'tag_title'  Blue Collar Man
                                             'bpm'  126.174
                                    'search_title'  'blue':1 'collar':2 'man':3
                                   'search_artist'  'styx':1
                                  'search_release'  'best':2 'of':3 'styx':4 'the':1
                                     'search_rest'  'classicprogpsy':1 'cppex':5 'greatest':2 'hits':3 'progressive':6 'rock':4
                                    'search_combo'  'best':6C 'blue':1A 'classicprogpsy':9 'collar':2A 'cppex':13 'greatest':10 'hits':11 'man':3A 'of':7C 'progressive':14 'rock':12 'styx':4B,8C 'the':5C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'hard rock', 'rock', 'progressive rock', 'classic rock']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736176.9343774  (2021-05-11 14:29:36)
                             'size'  5947307