======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '247'
                                          'artist'  'Marvin Gaye'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Got To Give It Up (Part 1)'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-JZFKS-3', 'Q-OLDST-2', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-4', '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'  "['rnb', 'motown', 'rhythm and blues', 'soul', 'funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  ''
                                            'date'  '1977'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;funk or soul;set-pl-billboard'
                                             'bpm'  '122.215'
                                             'key'  '8A'
                                        '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))                     '122.215'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'funk or soul', 'set-pl-billboard']
'TDRC' (Recording time)                             '1977'
'TIT2' (Title/songname/content description)         'Got To Give It Up (Part 1)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Marvin Gaye'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '20'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rnb', 'motown', 'rhythm and blues', 'soul', 'funk']
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.26 dB'
'TXXX:replaygain_track_peak'                        '0.626841'

========================== row from database ==========================
                                              'id'  1338692
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1977/020 - Marvin Gaye - Got To Give It Up (Part 1).mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  247
                                           'genre'  electronic-generic or radio-unsorted;funk or soul;set-pl-billboard
                                        'filesize'  4957383
                                           'mtime'  1620385159
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1977 020 electronic generic or radio unsorted;funk or soul;set pl billboard
                                      'tag_artist'  Marvin Gaye
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Got To Give It Up (Part 1)
                                             'bpm'  122.215
                                    'search_title'  '1':8,9 'give':3 'got':1 'it':4 'part':6,7 'to':2 'up':5
                                   'search_artist'  'gaye':2 'marvin':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1977':3 'billboard':17 'electronic':4 'funk':9,11 'generic':5 'or':6 'pl':16 'radio':7 'set':13,15 'soul':12,14 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':18 '1':8A,9A,17C '1977':20 'billboard':12C,34 'electronic':21 'funk':26,28 'gaye':11B 'generic':22 'give':3A 'got':1A 'it':4A 'marvin':10B 'of':16C 'or':23 'part':6A,7A 'pl':33 'pop':14C 'radio':24 'set':30,32 'singles':15C 'soul':29,31 'to':2A 'top':13C 'top100':19 'unsorted':25,27 'up':5A
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rnb', 'motown', 'rhythm and blues', 'soul', 'funk']
                                        'tag_date'  1977
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385158.661582  (2021-05-07 12:59:18)
                             'size'  4957383