======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '234'
                                          'artist'  'The Residents'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-3', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['electronic', 'post punk', 'avant garde', 'avantgarde', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '123.3'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '123.3'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TDRC' (Recording time)                             '1988'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Residents'
'TXXX:Mp3gain_minmax'                               '082,207'
'TXXX:Mp3gain_undo'                                 '+003,+003,N'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '3'
'TXXX:lastfmtags'                                   ['electronic', 'post punk', 'avant garde', 'avantgarde', 'experimental']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.81 dB'
'TXXX:replaygain_track_peak'                        '0.574930'

========================== row from database ==========================
                                              'id'  934929
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/The Residents/1972-4 - The Residents - Meet The Residents／Santa Dog (Torso, 1988) [192k]/[15] explosion (1).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  234
                                           'genre'  electronic-experimental
                                        'filesize'  5622715
                                           'mtime'  1636917079
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 1972 4 Meet Residents／Santa Dog (Torso, 1988) [192k] [15] explosion (1) electronic experimental
                                      'tag_artist'  The Residents
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  123.3
                                    'search_title'  None
                                   'search_artist'  'residents':2 'the':1
                                  'search_release'  
                                     'search_rest'  '1':19,20 '15':16,17 '192k':14,15 '1972':1 '1988':12,13 '4':2 'dog':9 'electronic':21 'experimental':22 'explosion':18 'meet':3 'residents':4,6 'residentssanta':8 'santa':5,7 'torso':10,11
                                    'search_combo'  '1':21,22 '15':18,19 '192k':16,17 '1972':3 '1988':14,15 '4':4 'dog':11 'electronic':23 'experimental':24 'explosion':20 'meet':5 'residents':2B,6,8 'residentssanta':10 'santa':7,9 'the':1B 'torso':12,13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'post punk', 'avant garde', 'avantgarde', 'experimental']
                                        'tag_date'  1988
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636917078.567197  (2021-11-14 20:11:18)
                             'size'  5622715