======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '4258'
                                          'artist'  'ACDC'
                                     'text_people'  ''
                                         'release'  'Live'
                                           'title'  'ACDC Live - Entire CD'
                                           'quals'  ("['Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', '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-2', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'classic rock', 'rock', 'heavy metal', 'australian artist']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '138.892'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Live'
'TBPM' (BPM (beats per minute))                     '138.892'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'ACDC Live - Entire CD'
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '4258000'
'TPE1' (Lead performer(s)/Soloist(s))               'ACDC'
'TRCK' (Track number/Position in set)               '00'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['hard rock', 'classic rock', 'rock', 'heavy metal', 'australian artist']
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.19 dB'
'TXXX:replaygain_track_peak'                        '0.492324'

========================== row from database ==========================
                                              'id'  1293668
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/AC DC - Live.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  4258
                                           'genre'  rock-unsorted
                                        'filesize'  68141642
                                           'mtime'  1620392292
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] rock unsorted
                                      'tag_artist'  ACDC
                                     'tag_release'  Live
                                       'tag_title'  ACDC Live - Entire CD
                                             'bpm'  138.892
                                    'search_title'  'acdc':1 'cd':4 'entire':3 'live':2
                                   'search_artist'  'acdc':1
                                  'search_release'  'live':1
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'loose':3,4 'rock':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 'acdc':1A,5B 'cd':4A 'entire':3A 'files':11,12 'live':2A,6C 'loose':9,10 'rock':13 'unsorted':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', 'classic rock', 'rock', 'heavy metal', 'australian artist']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620392291.648376  (2021-05-07 14:58:11)
                             'size'  68141642