======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '161'
                                          'artist'  'Perry Como'
                                     'text_people'  'Al Hoffman/Bix Reichner/Dick Manning'
                                         'release'  'Greatest Hits Disc 2'
                                           'title'  'Papa Loves Mambo'
                                           '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-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-easy'
                                             'bpm'  '84.809'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '54-024 POS 4'
'COMM:ID3v1 Comment:XXX'                            '54-024 POS 4'
'TALB' (Album/Movie/Show title)                     'Greatest Hits Disc 2'
'TBPM' (BPM (beats per minute))                     '84.809'
'TCOM' (Composer)                                   'Al Hoffman/Bix Reichner/Dick Manning'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-easy'
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         'Papa Loves Mambo'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Perry Como'
'TPE2' (Band/orchestra/accompaniment)               'Perry Como'
'TPUB' (Publisher)                                  'RCA'
'TRCK' (Track number/Position in set)               '14'
'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', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']
'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'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.58 dB'
'TXXX:replaygain_track_peak'                        '0.380850'

========================== row from database ==========================
                                              'id'  1431414
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/54-024 - Perry Como - Papa Loves Mambo.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  161
                                           'genre'  prerock-vocal-easy
                                        'filesize'  6461312
                                           'mtime'  1621625767
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 54 024 prerock vocal easy
                                      'tag_artist'  Perry Como
                                     'tag_release'  Greatest Hits Disc 2
                                       'tag_title'  Papa Loves Mambo
                                             'bpm'  84.809
                                    'search_title'  'loves':2 'mambo':3 'papa':1
                                   'search_artist'  'como':2 'perry':1
                                  'search_release'  '2':4 'disc':3 'greatest':1 'hits':2
                                     'search_rest'  '00oldiepop':5 '1954':6 '54':7 'country':4 'easy':10 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':14 '1954':15 '2':9C '54':16 'como':5B 'country':13 'disc':8C 'easy':19 'exotica':11 'greatest':6C 'hits':7C 'jazz':10 'loves':2A 'mambo':3A 'oldies':12 'papa':1A 'perry':4B 'prerock':17 'vocal':18
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  8A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']
                                        'tag_date'  1954
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621625766.6398976  (2021-05-21 21:36:06)
                             'size'  6461312