======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '172'
                                          'artist'  'Golden Earring'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', '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-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', 'dutch', '70s', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '137.3'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '137.3'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1975'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Golden Earring'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['hard rock', 'rock', 'dutch', '70s', 'classic rock']
'TXXX:q-bass'                                       '4'
'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'                        '-1.03 dB'
'TXXX:replaygain_track_peak'                        '0.669130'

========================== row from database ==========================
                                              'id'  1385290
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Golden Earrings - Golden years of Dutch pop music - CD1 - 16 - Sound Of The Screaming Day.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  172
                                           'genre'  rock-cppex
                                        'filesize'  6901558
                                           'mtime'  1620737419
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Earrings years of Dutch pop music CD1 16 Sound Of The Screaming Day rock cppex
                                      'tag_artist'  Golden Earring
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  137.3
                                    'search_title'  None
                                   'search_artist'  'earring':2 'golden':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'cd1':13 'cppex':19 'day':17 'dutch':10 'earrings':7 'files':5,6 'loose':3,4 'music':12 'of':9 'pop':11 'rock':18 'screaming':16 'sound':14 'the':15 'unsorted':2 'years':8
                                    'search_combo'  '00poprockelectronic':3 'cd1':15 'cppex':21 'day':19 'dutch':12 'earring':2B 'earrings':9 'files':7,8 'golden':1B 'loose':5,6 'music':14 'of':11 'pop':13 'rock':20 'screaming':18 'sound':16 'the':17 'unsorted':4 'years':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', 'rock', 'dutch', '70s', 'classic rock']
                                        'tag_date'  1975
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620737418.6097443  (2021-05-11 14:50:18)
                             'size'  6901558