======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '323'
                                          'artist'  'Pat Benatar'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'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-3']")
                                      'lastfmtags'  "['80s', 'classic rock', 'female vocalists', 'pop', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '120.902'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '120.902'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1985'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Pat Benatar'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'classic rock', 'female vocalists', 'pop', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.22 dB'
'TXXX:replaygain_track_peak'                        '0.590637'

========================== row from database ==========================
                                              'id'  1521760
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/pat benatar - greatest hits of the 80_s - c - love is a battlefield.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  323
                                           'genre'  rock-cppex
                                        'filesize'  5171200
                                           'mtime'  1620737443
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] pat benatar greatest hits of the 80_s c love is battlefield rock cppex
                                      'tag_artist'  Pat Benatar
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  120.902
                                    'search_title'  None
                                   'search_artist'  'benatar':2 'pat':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '80':13 'battlefield':18 'benatar':8 'c':15 'cppex':20 'files':5,6 'greatest':9 'hits':10 'is':17 'loose':3,4 'love':16 'of':11 'pat':7 'rock':19 's':14 'the':12 'unsorted':2
                                    'search_combo'  '00poprockelectronic':3 '80':15 'battlefield':20 'benatar':2B,10 'c':17 'cppex':22 'files':7,8 'greatest':11 'hits':12 'is':19 'loose':5,6 'love':18 'of':13 'pat':1B,9 'rock':21 's':16 'the':14 'unsorted':4
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'classic rock', 'female vocalists', 'pop', 'rock']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737442.8626363  (2021-05-11 14:50:42)
                             'size'  5171200