======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '172'
                                          'artist'  'Perry Como'
                                     'text_people'  ''
                                         'release'  'Greatest Hits Disc 2'
                                           'title'  'All At Once You Love Her'
                                           '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-2', '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'  '080'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-easy'
                                             'bpm'  '123.181'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits Disc 2'
'TBPM' (BPM (beats per minute))                     '123.181'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-easy'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'All At Once You Love Her'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Perry Como'
'TPUB' (Publisher)                                  'RCA'
'TRCK' (Track number/Position in set)               '080'
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.06 dB'
'TXXX:replaygain_track_peak'                        '0.569001'

========================== row from database ==========================
                                              'id'  1446530
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-080 - Perry Como - All At Once You Love Her.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  172
                                           'genre'  prerock-vocal-easy
                                        'filesize'  6899317
                                           'mtime'  1621625779
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 080 prerock vocal easy
                                      'tag_artist'  Perry Como
                                     'tag_release'  Greatest Hits Disc 2
                                       'tag_title'  All At Once You Love Her
                                             'bpm'  123.181
                                    'search_title'  'all':1 'at':2 'her':6 'love':5 'once':3 'you':4
                                   'search_artist'  'como':2 'perry':1
                                  'search_release'  '2':4 'disc':3 'greatest':1 'hits':2
                                     'search_rest'  '00oldiepop':5 '1956':6 'country':4 'easy':9 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'vocal':8
                                    'search_combo'  '00oldiepop':17 '1956':18 '2':12C 'all':1A 'at':2A 'como':8B 'country':16 'disc':11C 'easy':21 'exotica':14 'greatest':9C 'her':6A 'hits':10C 'jazz':13 'love':5A 'oldies':15 'once':3A 'perry':7B 'prerock':19 'vocal':20 'you':4A
                                    'tag_tracknum'  80
                                      '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-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621625778.7424734  (2021-05-21 21:36:18)
                             'size'  6899317