======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '170'
                                          'artist'  'Smash Mouth'
                                     'text_people'  ''
                                         'release'  'Fush Yu Mang'
                                           'title'  "Let's Rock"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['alternative rock', 'alternative', 'ska', 'pop', 'rock']"
                                     'discogstags'  "['rock', 'pop rock', 'ska']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'loc-style-reggae or dub or ska or dancehall-unsorted'
                                             'bpm'  '128.008'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:\x07\x1e\x00\x00'                PRIV(owner='AverageLevel', data=b'\x07\x1e\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Fush Yu Mang'
'TBPM' (BPM (beats per minute))                     '128.008'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-reggae or dub or ska or dancehall-unsorted'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         "Let's Rock"
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Smash Mouth'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'pop rock', 'ska']
'TXXX:lastfmtags'                                   ['alternative rock', 'alternative', 'ska', 'pop', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.96 dB'
'TXXX:replaygain_track_peak'                        '0.464839'

========================== row from database ==========================
                                              'id'  1304104
                                            'path'  /data/Music/Bulk/00poprockelectronic/Smash Mouth/Fush Yu Mang/04-smash_mouth-lets_rock-iro.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  170
                                           'genre'  loc-style-reggae or dub or ska or dancehall-unsorted
                                        'filesize'  4086093
                                           'mtime'  1620524873
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 04 smash_mouth lets_rock iro loc style reggae or dub or ska or dancehall unsorted
                                      'tag_artist'  Smash Mouth
                                     'tag_release'  Fush Yu Mang
                                       'tag_title'  Let's Rock
                                             'bpm'  128.008
                                    'search_title'  'let':1 'lets':3 'rock':4 's':2
                                   'search_artist'  'mouth':2 'smash':1
                                  'search_release'  'fush':1 'mang':3 'yu':2
                                     'search_rest'  '00poprockelectronic':1 'dancehall':13 'dub':11 'iro':6 'lets':4 'loc':7 'mouth':3 'or':10 'reggae':9 'rock':5 'ska':12 'smash':2 'style':8 'unsorted':14
                                    'search_combo'  '00poprockelectronic':10 'dancehall':22 'dub':20 'fush':7C 'iro':15 'let':1A 'lets':3A,13 'loc':16 'mang':9C 'mouth':6B,12 'or':19 'reggae':18 'rock':4A,14 's':2A 'ska':21 'smash':5B,11 'style':17 'unsorted':23 'yu':8C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['alternative rock', 'alternative', 'ska', 'pop', 'rock']
                                        'tag_date'  1997
                                     'discogstags'  ['rock', 'pop rock', 'ska']

============================== file details ==============================
                                           'mtime'  1620524872.685213  (2021-05-09 03:47:52)
                             'size'  4086093