======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '171'
                                          'artist'  'Pianosaurus'
                                     'text_people'  ''
                                         'release'  'music for maniacs'
                                           'title'  "Thriftshoppin'"
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-1']")
                                      'lastfmtags'  "['twee', 'spotify', 'chuck berry cover', 'ak', 'toy music']"
                                     'discogstags'  "['lo-fi', 'indie rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'set-pl-maniacs'
                                             'bpm'  '109.2'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'music for maniacs'
'TBPM' (BPM (beats per minute))                     '109.2'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-maniacs'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         "Thriftshoppin'"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Pianosaurus'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['lo-fi', 'indie rock', 'rock']
'TXXX:lastfmtags'                                   ['twee', 'spotify', 'chuck berry cover', 'ak', 'toy music']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.80 dB'
'TXXX:replaygain_track_peak'                        '0.390384'

========================== row from database ==========================
                                              'id'  1514702
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/music for maniacs/Pianosaurus - thriftshoppin_.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  171
                                           'genre'  set-pl-maniacs
                                        'filesize'  3428224
                                           'mtime'  1621473281
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm thriftshoppin_ set pl
                                      'tag_artist'  Pianosaurus
                                     'tag_release'  music for maniacs
                                       'tag_title'  Thriftshoppin'
                                             'bpm'  109.2
                                    'search_title'  'thriftshoppin':1,2
                                   'search_artist'  'pianosaurus':1
                                  'search_release'  'for':2 'maniacs':3 'music':1
                                     'search_rest'  'pl':3 'set':2 'thriftshoppin':1
                                    'search_combo'  'for':5C 'maniacs':6C 'music':4C 'pianosaurus':3B 'pl':9 'set':8 'thriftshoppin':1A,2A,7
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['twee', 'spotify', 'chuck berry cover', 'ak', 'toy music']
                                        'tag_date'  1987
                                     'discogstags'  ['lo-fi', 'indie rock', 'rock']

============================== file details ==============================
                                           'mtime'  1621473281.4644365  (2021-05-20 03:14:41)
                             'size'  3428224