======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '170'
                                          'artist'  "O'jays"
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Used to Be My Girl'
                                           'quals'  ("['Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-3', '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-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['soul', 'funk', 'motown', 'philly soul', '70s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '42'
                                      'tracktotal'  ''
                                            'date'  '1978'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '113.136'
                                             'key'  '3B'
                                        '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))                     '113.136'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1978'
'TIT2' (Title/songname/content description)         'Used to Be My Girl'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               "O'jays"
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '42'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['soul', 'funk', 'motown', 'philly soul', '70s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                        '+1.32 dB'
'TXXX:replaygain_track_peak'                        '0.433973'

========================== row from database ==========================
                                              'id'  1520053
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1978/042 - O_jays - Used to Be My Girl.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  170
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  3407670
                                           'mtime'  1620567828
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1978 042 O_jays electronic generic or radio unsorted
                                      'tag_artist'  O'jays
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Used to Be My Girl
                                             'bpm'  113.136
                                    'search_title'  'be':3 'girl':5 'my':4 'to':2 'used':1
                                   'search_artist'  'jays':2 'o':1 'ojays':3
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1978':3 'electronic':6 'generic':7 'jays':5 'o':4 'or':8 'radio':9 'top100':2 'unsorted':10
                                    'search_combo'  '00poprockelectronic':15 '1':14C '1978':17 'be':3A 'billboard':9C 'electronic':20 'generic':21 'girl':5A 'jays':7B,19 'my':4A 'o':6B,18 'of':13C 'ojays':8B 'or':22 'pop':11C 'radio':23 'singles':12C 'to':2A 'top':10C 'top100':16 'unsorted':24 'used':1A
                                    'tag_tracknum'  42
                                      'num_images'  0
                                             'key'  3B
                                           '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-3', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['soul', 'funk', 'motown', 'philly soul', '70s']
                                        'tag_date'  1978
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620567828.4154842  (2021-05-09 15:43:48)
                             'size'  3407670