======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '257'
                                          'artist'  'Notorious B.I.G and Puff Daddy'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Mo Money, Mo Problems'
                                           'quals'  ("['Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['hip-hop', 'rap', 'gangsta rap', 'east coast rap', 'hip hop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '138.987'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '138.987'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Mo Money, Mo Problems'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Notorious B.I.G and Puff Daddy'
'TRCK' (Track number/Position in set)               '0'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hip-hop', 'rap', 'gangsta rap', 'east coast rap', 'hip hop']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.09 dB'
'TXXX:replaygain_track_peak'                        '0.563938'
'TXXX:tracknum'                                     '115'

========================== row from database ==========================
                                              'id'  1349783
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/115 - Notorious B.I.G and Puff Daddy - Mo Money, Mo Problems (1997).mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  257
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  3606605
                                           'mtime'  1645790032
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 90s 115 (1997) electronic generic radio unsorted;set pl billboard
                                      'tag_artist'  Notorious B.I.G and Puff Daddy
                                     'tag_release'  None
                                       'tag_title'  Mo Money, Mo Problems
                                             'bpm'  138.987
                                    'search_title'  'mo':1 'money':2,3 'problems':4
                                   'search_artist'  'and':6 'b':2 'big':5 'daddy':8 'g':4 'i':3 'notorious':1 'puff':7
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '115':3 '1997':4,5 '90s':2 'billboard':14 'electronic':6 'generic':7 'pl':13 'radio':8 'set':10,12 'unsorted':9,11
                                    'search_combo'  '00poprockelectronic':13 '115':15 '1997':16,17 '90s':14 'and':10B 'b':6B 'big':9B 'billboard':26 'daddy':12B 'electronic':18 'g':8B 'generic':19 'i':7B 'mo':1A 'money':2A,3A 'notorious':5B 'pl':25 'problems':4A 'puff':11B 'radio':20 'set':22,24 'unsorted':21,23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']
                                      'lastfmtags'  ['hip-hop', 'rap', 'gangsta rap', 'east coast rap', 'hip hop']
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1645790032.3168895  (2022-02-25 12:53:52)
                             'size'  3606605