======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '141'
                                          'artist'  'Liberace'
                                     'text_people'  ''
                                         'release'  'US-Billboard-Charts'
                                           'title'  'Twelfth Street Rag'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-PLAY-2', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-chart-1', "
 "'q-drums-2', 'q-other-3', 'q-vocals-1', 'q-mixbeat-1', 'Q-PIANO-4']")
                                      'lastfmtags'  "['piano', 'illstreet', 'classical', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '130'
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted;set-pl-billboard'
                                             'bpm'  '84.210'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '54-221 POS 23'
'COMM:ID3v1 Comment:XXX'                            '54-221 POS 23'
'TALB' (Album/Movie/Show title)                     'US-Billboard-Charts'
'TBPM' (BPM (beats per minute))                     '84.210'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         'Twelfth Street Rag'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Liberace'
'TRCK' (Track number/Position in set)               '130'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['piano', 'illstreet', 'classical', 'easy listening']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.94 dB'
'TXXX:replaygain_track_peak'                        '0.595359'

========================== row from database ==========================
                                              'id'  1443135
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/54-221 - Liberace - Twelfth Street Rag.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  141
                                           'genre'  prerock-unsorted;set-pl-billboard
                                        'filesize'  5682070
                                           'mtime'  1620573973
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 54 221 prerock unsorted;set pl billboard
                                      'tag_artist'  Liberace
                                     'tag_release'  US-Billboard-Charts
                                       'tag_title'  Twelfth Street Rag
                                             'bpm'  84.21
                                    'search_title'  'rag':3 'street':2 'twelfth':1
                                   'search_artist'  'liberace':1
                                  'search_release'  'billboard':2 'charts':3 'us':1 'usbillboardcharts':4
                                     'search_rest'  '00oldiepop':5 '1954':6 '221':8 '54':7 'billboard':15 'country':4 'exotica':2 'jazz':1 'oldies':3 'pl':14 'prerock':9 'set':11,13 'unsorted':10,12
                                    'search_combo'  '00oldiepop':13 '1954':14 '221':16 '54':15 'billboard':6C,23 'charts':7C 'country':12 'exotica':10 'jazz':9 'liberace':4B 'oldies':11 'pl':22 'prerock':17 'rag':3A 'set':19,21 'street':2A 'twelfth':1A 'unsorted':18,20 'us':5C 'usbillboardcharts':8C
                                    'tag_tracknum'  130
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-PLAY-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['piano', 'illstreet', 'classical', 'easy listening']
                                        'tag_date'  1954
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620573973.009399  (2021-05-09 17:26:13)
                             'size'  5682070