======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '168'
                                          'artist'  'Ernest Tubb'
                                     'text_people'  ''
                                         'release'  'Billboard Greatest Christmas Hits: Country'
                                           'title'  'Blue Christmas'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-3', 'q-busy-2', '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'  "['country', 'western swing', 'honky tonk', 'old country', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1949'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted;set-th-christmas'
                                             'bpm'  '134.556'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         ['Debuted 12/24/49+ and peaked at #21 on Various Charts. Source: Pop Hits',
 'Debuted 1949 and peaked at # on Various Charts. Label/Number: Decca 9-46186. '
 'Hot Country Singles\r\n']
'COMM:ID3v1 Comment:XXX'                            'Debuted 12/24/49+ and peaked'
'TALB' (Album/Movie/Show title)                     'Billboard Greatest Christmas Hits: Country'
'TBPM' (BPM (beats per minute))                     '134.556'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-unsorted', 'set-th-christmas']
'TDRC' (Recording time)                             '1949'
'TIT2' (Title/songname/content description)         'Blue Christmas'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Ernest Tubb'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'western swing', 'honky tonk', 'old country', 'classic country']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'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'                        '-0.16 dB'
'TXXX:replaygain_track_peak'                        '0.483468'
'UFID:'                                             UFID(owner='', data=b'XL\x00 CH1949_003')

========================== row from database ==========================
                                              'id'  1445392
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1949/ch1949_003 - ernest tubb - blue christmas 128 js (2.49).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  168
                                           'genre'  prerock-unsorted;set-th-christmas
                                        'filesize'  2711552
                                           'mtime'  1620343023
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1949 ch1949_003 ernest tubb blue christmas 128 js (2.49) prerock unsorted;set th christmas
                                      'tag_artist'  Ernest Tubb
                                     'tag_release'  Billboard Greatest Christmas Hits: Country
                                       'tag_title'  Blue Christmas
                                             'bpm'  134.556
                                    'search_title'  'blue':1 'christmas':2
                                   'search_artist'  'ernest':1 'tubb':2
                                  'search_release'  'billboard':1 'christmas':3 'country':6 'greatest':2 'hits':4,5
                                     'search_rest'  '003':8 '00oldiepop':5 '128':13 '1949':6 '2':15 '249':17 '49':16 'blue':11 'ch1949':7 'christmas':12 'country':4 'ernest':9 'exotica':2 'jazz':1 'js':14 'oldies':3 'prerock':18 'set':20,22 'th':23 'tubb':10 'unsorted':19,21
                                    'search_combo'  '003':18 '00oldiepop':15 '128':23 '1949':16 '2':25 '249':27 '49':26 'billboard':5C 'blue':1A,21 'ch1949':17 'christmas':2A,7C,22 'country':10C,14 'ernest':3B,19 'exotica':12 'greatest':6C 'hits':8C,9C 'jazz':11 'js':24 'oldies':13 'prerock':28 'set':30,32 'th':33 'tubb':4B,20 'unsorted':29,31
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  9B
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['country', 'western swing', 'honky tonk', 'old country', 'classic country']
                                        'tag_date'  1949
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620343023.2192297  (2021-05-07 01:17:03)
                             'size'  2711552