======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '234'
                                          'artist'  'The Prime Movers'
                                     'text_people'  ''
                                         'release'  'The A -Square Record Story - Michigan Rock & Roll'
                                           'title'  "I'm A Man"
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'garage rock', 'mod', 'garage', 'spotify']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  '25'
                                            'date'  '1966'
                                        'comments'  ''
                                           'genre'  'set-pl-spelling'
                                             'bpm'  '131.755'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 000012FD 000012FD 00008F54 00008F54 0003209C 0003209C 00008610 00008610 '
 '00024982 00024982')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000780 00000000009D83F0 00000000 0055AA9D 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '25+85D1D6586D3642907DD14FCD836549FE+11351968'
'TALB' (Album/Movie/Show title)                     'The A -Square Record Story - Michigan Rock & Roll'
'TBPM' (BPM (beats per minute))                     '131.755'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-spelling'
'TDRC' (Recording time)                             '1966'
'TENC' (Encoded by)                                 'iTunes 8.0.2'
'TIT2' (Title/songname/content description)         "I'm A Man"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Prime Movers'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '16/25'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['rock', 'garage rock', 'mod', 'garage', 'spotify']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                        '+0.86 dB'
'TXXX:replaygain_track_peak'                        '0.395458'

========================== row from database ==========================
                                              'id'  1498573
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Prime Movers (incl. Jim Osterberg) - I_m A Man.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  234
                                           'genre'  set-pl-spelling
                                        'filesize'  5621521
                                           'mtime'  1620356389
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling (incl. Jim Osterberg) I_m set pl spelling
                                      'tag_artist'  The Prime Movers
                                     'tag_release'  The A -Square Record Story - Michigan Rock & Roll
                                       'tag_title'  I'm A Man
                                             'bpm'  131.755
                                    'search_title'  'a':4 'i':1 'im':3 'm':2 'man':5
                                   'search_artist'  'movers':3 'prime':2 'the':1
                                  'search_release'  'a':2 'michigan':7 'record':5 'rock':8 'roll':9 'square':3,4 'story':6 'the':1
                                     'search_rest'  '0novelty':2 '0playlists':1 'i':10 'incl':5,6 'jim':7 'm':11 'osterberg':8,9 'pl':13 'set':12 'spelling':4 'themes':3
                                    'search_combo'  '0novelty':19 '0playlists':18 'a':4A,10C 'i':1A,27 'im':3A 'incl':22,23 'jim':24 'm':2A,28 'man':5A 'michigan':15C 'movers':8B 'osterberg':25,26 'pl':30 'prime':7B 'record':13C 'rock':16C 'roll':17C 'set':29 'spelling':21 'square':11C,12C 'story':14C 'the':6B,9C 'themes':20
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'garage rock', 'mod', 'garage', 'spotify']
                                        'tag_date'  1966
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620356389.213255  (2021-05-07 04:59:49)
                             'size'  5621521