======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '325'
                                          'artist'  'Earth, Wind & Fire'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'll Write A Song For You"
                                           'quals'  ("['Q-HAP-4', 'Q-LOCALNESS-1', 'Q-JZFKS-3', 'Q-HHRNBTT-2', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['rnb', '70s', 'soul', 'funk', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'electronic-we-disco or italo'
                                             'bpm'  '103.6'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.6'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-disco or italo'
'TDRC' (Recording time)                             '1980'
'TIT2' (Title/songname/content description)         "I'll Write A Song For You"
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Earth, Wind & Fire'
'TRCK' (Track number/Position in set)               '0'
'TXXX:Q-HAP'                                        '4'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rnb', '70s', 'soul', 'funk', 'disco']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.47 dB'
'TXXX:replaygain_track_peak'                        '0.591776'

========================== row from database ==========================
                                              'id'  1526326
                                            'path'  /data/Music/Bulk/00poprockelectronic/Disco 70_s 80_s/Earth Wind & Fire/Earth, Wind & Fire - I_ll Write A Song For You.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  325
                                           'genre'  electronic-we-disco or italo
                                        'filesize'  5201792
                                           'mtime'  1620537743
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Disco 70_s 80_s I_ll electronic we disco italo
                                      'tag_artist'  Earth, Wind & Fire
                                     'tag_release'  None
                                       'tag_title'  I'll Write A Song For You
                                             'bpm'  103.6
                                    'search_title'  'a':5 'for':7 'i':1 'ill':3 'll':2 'song':6 'write':4 'you':8
                                   'search_artist'  'earth':1,2 'fire':4 'wind':3
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '70':3 '80':5 'disco':2 'electronic':9 'i':7 'italo':11 'll':8 's':4,6 'we':10
                                    'search_combo'  '00poprockelectronic':13 '70':15 '80':17 'a':5A 'disco':14 'earth':9B,10B 'electronic':21 'fire':12B 'for':7A 'i':1A,19 'ill':3A 'italo':23 'll':2A,20 's':16,18 'song':6A 'we':22 'wind':11B 'write':4A 'you':8A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-2', 'q-other-3', 'Q-HAP-4', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['rnb', '70s', 'soul', 'funk', 'disco']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620537742.5847113  (2021-05-09 07:22:22)
                             'size'  5201792