======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '260'
                                          'artist'  'Jerry Butler & Brenda Lee Eage'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1972'
                                           'title'  "Ain't Understanding"
                                           'quals'  ("['Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '85'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '141.118'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1972'
'TBPM' (BPM (beats per minute))                     '141.118'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         "Ain't Understanding"
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jerry Butler & Brenda Lee Eage'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '85'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.22 dB'
'TXXX:replaygain_track_peak'                        '0.539601'

========================== row from database ==========================
                                              'id'  1505329
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1972/085 - Jerry Butler & Brenda Lee Eager - Ain_t Understanding.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  260
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  5221797
                                           'mtime'  1620385028
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 085 Eager Ain_t electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Jerry Butler & Brenda Lee Eage
                                     'tag_release'  Billboard Top Pop Singles of 1972
                                       'tag_title'  Ain't Understanding
                                             'bpm'  141.118
                                    'search_title'  'ain':1 'aint':3 't':2 'understanding':4
                                   'search_artist'  'brenda':3 'butler':2 'eage':5 'jerry':1 'lee':4
                                  'search_release'  '1972':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'ain':4 'billboard':15 'eager':3 'electronic':6 'generic':7 'or':8 'pl':14 'radio':9 'set':11,13 't':5 'top100':2 'unsorted':10,12
                                    'search_combo'  '00poprockelectronic':16 '1972':15C 'ain':1A,19 'aint':3A 'billboard':10C,30 'brenda':7B 'butler':6B 'eage':9B 'eager':18 'electronic':21 'generic':22 'jerry':5B 'lee':8B 'of':14C 'or':23 'pl':29 'pop':12C 'radio':24 'set':26,28 'singles':13C 't':2A,20 'top':11C 'top100':17 'understanding':4A 'unsorted':25,27
                                    'tag_tracknum'  85
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385027.5916662  (2021-05-07 12:57:07)
                             'size'  5221797