======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '215'
                                          'artist'  'Wreckless Eric'
                                     'text_people'  ''
                                         'release'  'Wreckless Eric'
                                           'title'  'Be Stiff'
                                           '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-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['new wave', 'pub rock', 'punk', 'british', 'rock']"
                                     'discogstags'  "['rock', 'rock & roll', 'punk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '13'
                                            'date'  '1978'
                                        'comments'  ''
                                           'genre'  'set-pl-spelling;rock-unsorted'
                                             'bpm'  '119.124'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000CB3 000009FB 0000D1C7 00008AF7 0000F01A 0000EFB1 00007EA5 00007F52 '
 '0000703E 0000AC0A')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000007D4 000000000090F69C 00000000 004ED60B 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '13+D9941D72BEC085A702EF1212CBA2DB56+2063719'
'TALB' (Album/Movie/Show title)                     'Wreckless Eric'
'TBPM' (BPM (beats per minute))                     '119.124'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-spelling', 'rock-unsorted']
'TDRC' (Recording time)                             '1978'
'TENC' (Encoded by)                                 'iTunes v7.5'
'TIT2' (Title/songname/content description)         'Be Stiff'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Wreckless Eric'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '12/13'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'rock & roll', 'punk']
'TXXX:lastfmtags'                                   ['new wave', 'pub rock', 'punk', 'british', 'rock']
'TXXX:q-bass'                                       '4'
'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'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.67 dB'
'TXXX:replaygain_track_peak'                        '0.426334'

========================== row from database ==========================
                                              'id'  769837
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Wreckless Eric - Be Stiff.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  215
                                           'genre'  set-pl-spelling;rock-unsorted
                                        'filesize'  5173825
                                           'mtime'  1620392916
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling set pl spelling;rock unsorted
                                      'tag_artist'  Wreckless Eric
                                     'tag_release'  Wreckless Eric
                                       'tag_title'  Be Stiff
                                             'bpm'  119.124
                                    'search_title'  'be':1 'stiff':2
                                   'search_artist'  'eric':2 'wreckless':1
                                  'search_release'  'eric':2 'wreckless':1
                                     'search_rest'  '0novelty':2 '0playlists':1 'pl':6 'rock':8,10 'set':5 'spelling':4,7,9 'themes':3 'unsorted':11
                                    'search_combo'  '0novelty':8 '0playlists':7 'be':1A 'eric':4B,6C 'pl':12 'rock':14,16 'set':11 'spelling':10,13,15 'stiff':2A 'themes':9 'unsorted':17 'wreckless':3B,5C
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['new wave', 'pub rock', 'punk', 'british', 'rock']
                                        'tag_date'  1978
                                     'discogstags'  ['rock', 'rock & roll', 'punk']

============================== file details ==============================
                                           'mtime'  1620392915.7880263  (2021-05-07 15:08:35)
                             'size'  5173825