======================== unified (from filesystem) ========================
                                         'bitrate'  '201.011'
                                        'duration'  '216'
                                          'artist'  'Imogen Heap'
                                     'text_people'  ''
                                         'release'  'Speak for Yourself'
                                           'title'  'Headlock'
                                           'quals'  "['q-bass-3', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'trip-hop,pop'
                                             'bpm'  '120.1'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'TALB' (Album/Movie/Show title)                     'Speak for Yourself'
'TBPM' (BPM (beats per minute))                     '120.1'
'TCON' (Content type, a.k.a. Genre)                 'trip-hop,pop'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         'Headlock'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Imogen Heap'
'TPE2' (Band/orchestra/accompaniment)               'Imogen Heap'
'TRCK' (Track number/Position in set)               '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.01 dB'
'TXXX:replaygain_track_peak'                        '0.445742'

========================== row from database ==========================
                                              'id'  1538563
                                            'path'  /data/Music/Other/PrevSet/[0yay1]/Frou Frou/Headlock.mp3
                                         'working'  None
                                         'bitrate'  201
                                    'duration_sec'  216
                                           'genre'  trip-hop,pop
                                        'filesize'  5490182
                                           'mtime'  1662800154
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [0yay1] Frou Frou trip hop,pop
                                      'tag_artist'  Imogen Heap
                                     'tag_release'  Speak for Yourself
                                       'tag_title'  Headlock
                                             'bpm'  120.1
                                    'search_title'  'headlock':1
                                   'search_artist'  'heap':2 'imogen':1
                                  'search_release'  'for':2 'speak':1 'yourself':3
                                     'search_rest'  '0yay1':2,3 'frou':4 'hop':6,8 'pop':7,9 'prev':10 'prevset':1 'set':11 'trip':5
                                    'search_combo'  '0yay1':8,9 'for':5C 'frou':10 'headlock':1A 'heap':3B 'hop':12,14 'imogen':2B 'pop':13,15 'prev':16 'prevset':7 'set':17 'speak':4C 'trip':11 'yourself':6C
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['q-bass-3', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800154.4976275  (2022-09-10 10:55:54)
                             'size'  5490182