======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '339'
                                          'artist'  'Earth, Wind & Fire'
                                     'text_people'  ''
                                         'release'  '100 Oldies Deel 34'
                                           'title'  "Let's Groove"
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-JZFKS-3', 'Q-HHRNBTT-2', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rnb', '70s', 'soul', 'funk', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '67'
                                      'tracktotal'  '100'
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '125.939'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '100 Oldies Deel 34'
'TBPM' (BPM (beats per minute))                     '125.939'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1975'
'TENC' (Encoded by)                                 'Mister X'
'TIT2' (Title/songname/content description)         "Let's Groove"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Earth, Wind & Fire'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '67/100'
'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'                                      '3'
'TXXX:q-drums'                                      '4'
'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'                        '+1.35 dB'
'TXXX:replaygain_track_peak'                        '0.746224'

========================== row from database ==========================
                                              'id'  1520535
                                            'path'  /data/Music/Bulk/00poprockelectronic/100 oldies deel 35/67 Earth, Wind & Fire - Let_s Groove.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  339
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  14066469
                                           'mtime'  1620565272
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic oldies deel 35 67 Let_s electronic generic or radio unsorted
                                      'tag_artist'  Earth, Wind & Fire
                                     'tag_release'  100 Oldies Deel 34
                                       'tag_title'  Let's Groove
                                             'bpm'  125.939
                                    'search_title'  'groove':4 'let':1 'lets':3 's':2
                                   'search_artist'  'earth':1,2 'fire':4 'wind':3
                                  'search_release'  '100':1 '34':4 'deel':3 'oldies':2
                                     'search_rest'  '00poprockelectronic':1 '35':4 '67':5 'deel':3 'electronic':8 'generic':9 'let':6 'oldies':2 'or':10 'radio':11 's':7 'unsorted':12
                                    'search_combo'  '00poprockelectronic':13 '100':9C '34':12C '35':16 '67':17 'deel':11C,15 'earth':5B,6B 'electronic':20 'fire':8B 'generic':21 'groove':4A 'let':1A,18 'lets':3A 'oldies':10C,14 'or':22 'radio':23 's':2A,19 'unsorted':24 'wind':7B
                                    'tag_tracknum'  67
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-2', '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-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['rnb', '70s', 'soul', 'funk', 'disco']
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620565272.4589357  (2021-05-09 15:01:12)
                             'size'  14066469