======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '139'
                                          'artist'  'Buddy Holly'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "That'll Be The Day"
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '127.0'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '127.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         "That'll Be The Day"
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Buddy Holly'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.69 dB'
'TXXX:replaygain_track_peak'                        '0.625300'

========================== row from database ==========================
                                              'id'  1516385
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Buddy Holly - That_ll Be The Day.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  139
                                           'genre'  prerock-unsorted
                                        'filesize'  2230618
                                           'mtime'  1620388050
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] That_ll prerock unsorted
                                      'tag_artist'  Buddy Holly
                                     'tag_release'  None
                                       'tag_title'  That'll Be The Day
                                             'bpm'  127.0
                                    'search_title'  'be':4 'day':6 'll':2 'that':1 'thatll':3 'the':5
                                   'search_artist'  'buddy':1 'holly':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'll':8 'loose':3,4 'prerock':9 'that':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':9 'be':4A 'buddy':7B 'day':6A 'files':13,14 'holly':8B 'll':2A,16 'loose':11,12 'prerock':17 'that':1A,15 'thatll':3A 'the':5A 'unsorted':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'rock', '50s']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620388049.887775  (2021-05-07 13:47:29)
                             'size'  2230618