======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '149'
                                          'artist'  'Clyde McPhatter'
                                     'text_people'  ''
                                         'release'  'Deep Sea Ball - The Best Of C'
                                           'title'  'You Went Back On Your Word '
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'doo wop', 'rhythm and blues', 'soul', '60s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-doowop'
                                             'bpm'  '144.130'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '59-413 POS 72'
'COMM:ID3v1 Comment:XXX'                            '59-413 POS 72'
'TALB' (Album/Movie/Show title)                     'Deep Sea Ball - The Best Of C'
'TBPM' (BPM (beats per minute))                     '144.130'
'TCON' (Content type, a.k.a. Genre)                 'prerock-doowop'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         'You Went Back On Your Word '
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Clyde McPhatter'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'doo wop', 'rhythm and blues', 'soul', '60s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.28 dB'
'TXXX:replaygain_track_peak'                        '0.370803'

========================== row from database ==========================
                                              'id'  1443978
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/59-413 - Clyde McPhatter - You Went Back On Your Word Little Girl.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  149
                                           'genre'  prerock-doowop
                                        'filesize'  5971507
                                           'mtime'  1621705424
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1959 59 413 Little Girl prerock doowop
                                      'tag_artist'  Clyde McPhatter
                                     'tag_release'  Deep Sea Ball - The Best Of C
                                       'tag_title'  You Went Back On Your Word 
                                             'bpm'  144.13
                                    'search_title'  'back':3 'on':4 'went':2 'word':6 'you':1 'your':5
                                   'search_artist'  'clyde':1 'mc':3 'mcphatter':2 'phatter':4
                                  'search_release'  'ball':3 'best':5 'c':7 'deep':1 'of':6 'sea':2 'the':4
                                     'search_rest'  '00oldiepop':5 '1959':6 '413':8 '59':7 'country':4 'doowop':12 'exotica':2 'girl':10 'jazz':1 'little':9 'oldies':3 'prerock':11
                                    'search_combo'  '00oldiepop':22 '1959':23 '413':25 '59':24 'back':3A 'ball':13C 'best':15C 'c':17C 'clyde':7B 'country':21 'deep':11C 'doowop':29 'exotica':19 'girl':27 'jazz':18 'little':26 'mc':9B 'mcphatter':8B 'of':16C 'oldies':20 'on':4A 'phatter':10B 'prerock':28 'sea':12C 'the':14C 'went':2A 'word':6A 'you':1A 'your':5A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'doo wop', 'rhythm and blues', 'soul', '60s']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705424.4545267  (2021-05-22 19:43:44)
                             'size'  5971507