======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '286'
                                          'artist'  'Robert Plant'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Little By Little (single version)'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'blues', 'rock', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'rock-early-blues;rock-cppex'
                                             'bpm'  '103.062'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.062'
'TCON' (Content type, a.k.a. Genre)                 ['rock-early-blues', 'rock-cppex']
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         'Little By Little (single version)'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Robert Plant'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hard rock', 'blues', 'rock', 'british', 'classic rock']
'TXXX:other'                                        'A'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.531672'

========================== row from database ==========================
                                              'id'  1349308
                                            'path'  /data/Music/Bulk/00poprockelectronic/1985 complete/149-A Robert Plant - Little By Little (single version).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  286
                                           'genre'  rock-early-blues;rock-cppex
                                        'filesize'  11456512
                                           'mtime'  1652397858
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1985 complete 149 A rock early blues;rock cppex
                                      'tag_artist'  Robert Plant
                                     'tag_release'  None
                                       'tag_title'  Little By Little (single version)
                                             'bpm'  103.062
                                    'search_title'  'by':2 'little':1 'single':3,4 'version':5,6
                                   'search_artist'  'plant':2 'robert':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '149':4 '1985':2 'a':5 'blues':8,10 'complete':3 'cppex':12 'early':7 'rock':6,9,11
                                    'search_combo'  '00poprockelectronic':9 '149':12 '1985':10 'a':13 'blues':16,18 'by':2A 'complete':11 'cppex':20 'early':15 'little':1A 'plant':8B 'robert':7B 'rock':14,17,19 'single':3A,4A 'version':5A,6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']
                                      'lastfmtags'  ['hard rock', 'blues', 'rock', 'british', 'classic rock']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1652397858.0821164  (2022-05-13 01:24:18)
                             'size'  11456512