======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '140'
                                          'artist'  'Chubby Checker'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1961'
                                           'title'  "Let's Twist Again"
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-2', 'q-other-1', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'twist', 'oldies', '60s', 'rock n roll']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '94'
                                      'tracktotal'  ''
                                            'date'  '1961'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '108.646'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1961'
'TBPM' (BPM (beats per minute))                     '108.646'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1961'
'TIT2' (Title/songname/content description)         "Let's Twist Again"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Chubby Checker'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '94'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'twist', 'oldies', '60s', 'rock n roll']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-1.56 dB'
'TXXX:replaygain_track_peak'                        '0.593735'

========================== row from database ==========================
                                              'id'  1517266
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1961/094 - Chubby Checker - Let_s Twist Again.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  140
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  2250197
                                           'mtime'  1620384907
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 094 Let_s electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Chubby Checker
                                     'tag_release'  Billboard Top Pop Singles of 1961
                                       'tag_title'  Let's Twist Again
                                             'bpm'  108.646
                                    'search_title'  'again':5 'let':1 'lets':3 's':2 'twist':4
                                   'search_artist'  'checker':2 'chubby':1
                                  'search_release'  '1961':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'billboard':14 'electronic':5 'generic':6 'let':3 'or':7 'pl':13 'radio':8 's':4 'set':10,12 'top100':2 'unsorted':9,11
                                    'search_combo'  '00poprockelectronic':14 '1961':13C 'again':5A 'billboard':8C,27 'checker':7B 'chubby':6B 'electronic':18 'generic':19 'let':1A,16 'lets':3A 'of':12C 'or':20 'pl':26 'pop':10C 'radio':21 's':2A,17 'set':23,25 'singles':11C 'top':9C 'top100':15 'twist':4A 'unsorted':22,24
                                    'tag_tracknum'  94
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'twist', 'oldies', '60s', 'rock n roll']
                                        'tag_date'  1961
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620384907.4030228  (2021-05-07 12:55:07)
                             'size'  2250197