======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '213'
                                          'artist'  'Bad News'
                                     'text_people'  ''
                                         'release'  'Bad News'
                                           'title'  'Bohemian Rhapsod'
                                           'quals'  ("['Q-JZFKS-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-UNU-2', 'q-syn-2', "
 "'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-3', "
 "'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  '[\'comedy\', \'heavy metal\', \'noise\', \'all\', "80\'s"]'
                                     'discogstags'  "['hardcore', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-cover or covered'
                                             'bpm'  '141.909'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Bad News'
'TBPM' (BPM (beats per minute))                     '141.909'
'TCON' (Content type, a.k.a. Genre)                 'set-cover or covered'
'TIT2' (Title/songname/content description)         'Bohemian Rhapsod'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bad News'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['hardcore', 'rock']
'TXXX:lastfmtags'                                   ['comedy', 'heavy metal', 'noise', 'all', "80's"]
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.32 dB'
'TXXX:replaygain_track_peak'                        '0.599419'

========================== row from database ==========================
                                              'id'  1297047
                                            'path'  /data/Music/Bulk/00poprockelectronic/misc/Bad News - Bohemian Rhapsod.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  213
                                           'genre'  set-cover or covered
                                        'filesize'  3415936
                                           'mtime'  1652398010
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic misc set cover or covered
                                      'tag_artist'  Bad News
                                     'tag_release'  Bad News
                                       'tag_title'  Bohemian Rhapsod
                                             'bpm'  141.909
                                    'search_title'  'bohemian':1 'rhapsod':2
                                   'search_artist'  'bad':1 'news':2
                                  'search_release'  'bad':1 'news':2
                                     'search_rest'  '00poprockelectronic':1 'cover':4 'covered':6 'misc':2 'or':5 'set':3
                                    'search_combo'  '00poprockelectronic':7 'bad':3B,5C 'bohemian':1A 'cover':10 'covered':12 'misc':8 'news':4B,6C 'or':11 'rhapsod':2A 'set':9
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-JZFKS-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-UNU-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']
                                      'lastfmtags'  ['comedy', 'heavy metal', 'noise', 'all', "80's"]
                                        'tag_date'  
                                     'discogstags'  ['hardcore', 'rock']

============================== file details ==============================
                                           'mtime'  1652398009.7562134  (2022-05-13 01:26:49)
                             'size'  3415936