======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '151'
                                          'artist'  'No Unauthorized '
                                     'text_people'  ''
                                         'release'  'A Tribute to Some Bizarre vol. 1'
                                           'title'  'Sans Requin'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-1']")
                                      'lastfmtags'  "['minimal synth', 'synthpop', 'minimal wave', 'new wave', 'industrial']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '92.9'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'A Tribute to Some Bizarre vol. 1'
'TBPM' (BPM (beats per minute))                     '92.9'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '1980'
'TIT2' (Title/songname/content description)         'Sans Requin'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'No Unauthorized '
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['minimal synth', 'synthpop', 'minimal wave', 'new wave', 'industrial']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.25 dB'
'TXXX:replaygain_track_peak'                        '0.424489'

========================== row from database ==========================
                                              'id'  850983
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/A Tribute To Some Bizarre/A Tribute To Some Bizarre Vol. 1 [128k-192k]/20 No Unauthorized - Sans Requin.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  151
                                           'genre'  electronic-unsorted
                                        'filesize'  3652036
                                           'mtime'  1620516574
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm To To Vol. [128k 192k] 20 electronic unsorted
                                      'tag_artist'  No Unauthorized 
                                     'tag_release'  A Tribute to Some Bizarre vol. 1
                                       'tag_title'  Sans Requin
                                             'bpm'  92.9
                                    'search_title'  'requin':2 'sans':1
                                   'search_artist'  'no':1 'unauthorized':2
                                  'search_release'  '1':8 'a':1 'bizarre':5 'some':4 'to':3 'tribute':2 'vol':6,7
                                     'search_rest'  '128k':4,5 '192k':6,7 '20':8 'electronic':9 'to':1 'unsorted':10 'vol':2,3
                                    'search_combo'  '1':12C '128k':16,17 '192k':18,19 '20':20 'a':5C 'bizarre':9C 'electronic':21 'no':3B 'requin':2A 'sans':1A 'some':8C 'to':7C,13 'tribute':6C 'unauthorized':4B 'unsorted':22 'vol':10C,11C,14,15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['minimal synth', 'synthpop', 'minimal wave', 'new wave', 'industrial']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620516573.7695272  (2021-05-09 01:29:33)
                             'size'  3652036