======================== unified (from filesystem) ========================
                                         'bitrate'  '112.001'
                                        'duration'  '1202'
                                          'artist'  'DJ Barfing Bart'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Stepmaniac'
                                           'quals'  "['q-bass-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '137.9'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:eng'                            'ogg had 112 kbps 44100 Hz'
'TBPM' (BPM (beats per minute))                     '137.9'
'TIT2' (Title/songname/content description)         'Stepmaniac'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'DJ Barfing Bart'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'

========================== row from database ==========================
                                              'id'  1538143
                                            'path'  /data/Music/Other/PrevSet/[7mixes]/Stepmaniac.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  1202
                                           'genre'  
                                        'filesize'  16853248
                                           'mtime'  1662800610
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [7mixes]
                                      'tag_artist'  DJ Barfing Bart
                                     'tag_release'  None
                                       'tag_title'  Stepmaniac
                                             'bpm'  137.9
                                    'search_title'  'stepmaniac':1
                                   'search_artist'  'barfing':2 'bart':3 'dj':1
                                  'search_release'  
                                     'search_rest'  '7mixes':2,3 'prev':4 'prevset':1 'set':5
                                    'search_combo'  '7mixes':6,7 'barfing':3B 'bart':4B 'dj':2B 'prev':8 'prevset':5 'set':9 'stepmaniac':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['q-bass-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800609.890926  (2022-09-10 11:03:29)
                             'size'  16853248