======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '131'
                                          'artist'  'Patti Page'
                                     'text_people'  ''
                                         'release'  'US-Billboard-Charts'
                                           'title'  "I Can't Tell A Waltz From A Tango"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'country', 'jazz', 'female vocalists', 'easy listening', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '34'
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '122.363'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '54-357 POS 30'
'COMM:ID3v1 Comment:XXX'                            '54-357 POS 30'
'TALB' (Album/Movie/Show title)                     'US-Billboard-Charts'
'TBPM' (BPM (beats per minute))                     '122.363'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         "I Can't Tell A Waltz From A Tango"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Patti Page'
'TRCK' (Track number/Position in set)               '34'
'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', 'country', 'jazz', 'female vocalists', 'easy listening', '50s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.87 dB'
'TXXX:replaygain_track_peak'                        '0.427459'

========================== row from database ==========================
                                              'id'  1516441
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/54-357 - Patti Page - I Can_t Tell A Waltz From A Tango.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  131
                                           'genre'  prerock-vocal
                                        'filesize'  5280829
                                           'mtime'  1621853327
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 54 357 Can_t prerock vocal
                                      'tag_artist'  Patti Page
                                     'tag_release'  US-Billboard-Charts
                                       'tag_title'  I Can't Tell A Waltz From A Tango
                                             'bpm'  122.363
                                    'search_title'  'a':6 'can':2 'cant':4 'from':8 'i':1 't':3 'tango':9 'tell':5 'waltz':7
                                   'search_artist'  'page':2 'patti':1
                                  'search_release'  'billboard':2 'charts':3 'us':1 'usbillboardcharts':4
                                     'search_rest'  '00oldiepop':5 '1954':6 '357':8 '54':7 'can':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':11 't':10 'vocal':12
                                    'search_combo'  '00oldiepop':20 '1954':21 '357':23 '54':22 'a':6A 'billboard':13C 'can':2A,24 'cant':4A 'charts':14C 'country':19 'exotica':17 'from':8A 'i':1A 'jazz':16 'oldies':18 'page':11B 'patti':10B 'prerock':26 't':3A,25 'tango':9A 'tell':5A 'us':12C 'usbillboardcharts':15C 'vocal':27 'waltz':7A
                                    'tag_tracknum'  34
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'country', 'jazz', 'female vocalists', 'easy listening', '50s']
                                        'tag_date'  1954
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621853326.739678  (2021-05-24 12:48:46)
                             'size'  5280829