======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '152'
                                          'artist'  'The Ames Brothers '
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  '49 Shades Of Green'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['50s', 'pop', 'jazz', 'ames brothers', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '281'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-americana'
                                             'bpm'  '145.790'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.790'
'TCON' (Content type, a.k.a. Genre)                 'prerock-americana'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         '49 Shades Of Green'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Ames Brothers '
'TRCK' (Track number/Position in set)               '281'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['50s', 'pop', 'jazz', 'ames brothers', 'oldies']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.42 dB'
'TXXX:replaygain_track_peak'                        '0.455072'

========================== row from database ==========================
                                              'id'  1435379
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-281 - The Ames Brothers  - 49 Shades Of Green.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  152
                                           'genre'  prerock-americana
                                        'filesize'  6107345
                                           'mtime'  1620561380
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 281 prerock americana
                                      'tag_artist'  The Ames Brothers 
                                     'tag_release'  None
                                       'tag_title'  49 Shades Of Green
                                             'bpm'  145.79
                                    'search_title'  '49':1 'green':4 'of':3 'shades':2
                                   'search_artist'  'ames':2 'brothers':3 'the':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '281':7 'americana':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':12 '1956':13 '281':14 '49':1A 'americana':16 'ames':6B 'brothers':7B 'country':11 'exotica':9 'green':4A 'jazz':8 'of':3A 'oldies':10 'prerock':15 'shades':2A 'the':5B
                                    'tag_tracknum'  281
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['50s', 'pop', 'jazz', 'ames brothers', 'oldies']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561379.6041262  (2021-05-09 13:56:19)
                             'size'  6107345