======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '170'
                                          'artist'  'Donny & Marie Osmond'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  "I'm Leaving It All Up To You"
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'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']")
                                      'lastfmtags'  "['american', 'easy listening', 'duet', 'pop', '70s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '81'
                                      'tracktotal'  ''
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '139.274'
                                             'key'  '6A'
                                        '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))                     '139.274'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         "I'm Leaving It All Up To You"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Donny & Marie Osmond'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '81'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['american', 'easy listening', 'duet', 'pop', '70s']
'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'                        '-0.45 dB'
'TXXX:replaygain_track_peak'                        '0.661209'

========================== row from database ==========================
                                              'id'  1518285
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1974/081 - Donny & Marie Osmond - I_m Leaving It All Up To You.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  170
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  3407250
                                           'mtime'  1620385092
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1974 081 I_m electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Donny & Marie Osmond
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  I'm Leaving It All Up To You
                                             'bpm'  139.274
                                    'search_title'  'all':6 'i':1 'im':3 'it':5 'leaving':4 'm':2 'to':8 'up':7 'you':9
                                   'search_artist'  'donny':1 'marie':2 'osmond':3
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1974':3 'billboard':15 'electronic':6 'generic':7 'i':4 'm':5 'or':8 'pl':14 'radio':9 'set':11,13 'top100':2 'unsorted':10,12
                                    'search_combo'  '00poprockelectronic':19 '1':18C '1974':21 'all':6A 'billboard':13C,33 'donny':10B 'electronic':24 'generic':25 'i':1A,22 'im':3A 'it':5A 'leaving':4A 'm':2A,23 'marie':11B 'of':17C 'or':26 'osmond':12B 'pl':32 'pop':15C 'radio':27 'set':29,31 'singles':16C 'to':8A 'top':14C 'top100':20 'unsorted':28,30 'up':7A 'you':9A
                                    'tag_tracknum'  81
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', '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'  ['american', 'easy listening', 'duet', 'pop', '70s']
                                        'tag_date'  1974
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385092.1429675  (2021-05-07 12:58:12)
                             'size'  3407250