======================== unified (from filesystem) ========================
                                         'bitrate'  '148.783'
                                        'duration'  '243'
                                          'artist'  'Nelson'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'After the Rain'
                                           'quals'  ("['Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['90s', 'rock', 'aor', 'melodic rock', 'hair metal', 'hard rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '56'
                                      'tracktotal'  ''
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '124.621'
                                             '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))                     '124.621'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1991'
'TIT2' (Title/songname/content description)         'After the Rain'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nelson'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '56'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['90s', 'rock', 'aor', 'melodic rock', 'hair metal', 'hard rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-5.50 dB'
'TXXX:replaygain_track_peak'                        '1.041381'

========================== row from database ==========================
                                              'id'  1304381
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1991/056 - Nelson - After the Rain.mp3
                                         'working'  None
                                         'bitrate'  148
                                    'duration_sec'  243
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  4532096
                                           'mtime'  1620385207
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1991 056 electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Nelson
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  After the Rain
                                             'bpm'  124.621
                                    'search_title'  'after':1 'rain':3 'the':2
                                   'search_artist'  'nelson':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1991':3 'billboard':13 'electronic':4 'generic':5 'or':6 'pl':12 'radio':7 'set':9,11 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':11 '1':10C '1991':13 'after':1A 'billboard':5C,23 'electronic':14 'generic':15 'nelson':4B 'of':9C 'or':16 'pl':22 'pop':7C 'radio':17 'rain':3A 'set':19,21 'singles':8C 'the':2A 'top':6C 'top100':12 'unsorted':18,20
                                    'tag_tracknum'  56
                                      '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-3', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['90s', 'rock', 'aor', 'melodic rock', 'hair metal', 'hard rock']
                                        'tag_date'  1991
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385207.4277089  (2021-05-07 13:00:07)
                             'size'  4532096