======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '222'
                                          'artist'  'Lou Bega'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Mambo No. 5'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dance', '90s', 'latin', 'pop', 'mambo']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '42'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '86.957'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1'
'TBPM' (BPM (beats per minute))                     '86.957'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Mambo No. 5'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Lou Bega'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '42'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['dance', '90s', 'latin', 'pop', 'mambo']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.46 dB'
'TXXX:replaygain_track_peak'                        '0.484060'

========================== row from database ==========================
                                              'id'  1354812
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1999__042 - Lou Bega - Mambo No. 5.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  222
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  3556779
                                           'mtime'  1621696134
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1999__042 electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Lou Bega
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Mambo No. 5
                                             'bpm'  86.957
                                    'search_title'  '5':4 'mambo':1 'no':2,3
                                   'search_artist'  'bega':2 'lou':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '042':4 '1999':3 'billboard':14 'electronic':5 'generic':6 'or':7 'pl':13 'radio':8 'set':10,12 'top100':2 'unsorted':9,11
                                    'search_combo'  '00poprockelectronic':13 '042':16 '1':12C '1999':15 '5':4A 'bega':6B 'billboard':7C,26 'electronic':17 'generic':18 'lou':5B 'mambo':1A 'no':2A,3A 'of':11C 'or':19 'pl':25 'pop':9C 'radio':20 'set':22,24 'singles':10C 'top':8C 'top100':14 'unsorted':21,23
                                    'tag_tracknum'  42
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', '90s', 'latin', 'pop', 'mambo']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696133.732238  (2021-05-22 17:08:53)
                             'size'  3556779