======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '222'
                                          'artist'  'Eddie Condon'
                                     'text_people'  ''
                                         'release'  'Dixieland'
                                           'title'  'Jazz Me Blues'
                                           'quals'  "['q-bass-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Other;jazz'
                                             'bpm'  '102.4'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'TALB' (Album/Movie/Show title)                     'Dixieland'
'TBPM' (BPM (beats per minute))                     '102.4'
'TCON' (Content type, a.k.a. Genre)                 ['Other', 'jazz']
'TIT2' (Title/songname/content description)         'Jazz Me Blues'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Eddie Condon'
'TRCK' (Track number/Position in set)               '4'
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '1'

========================== row from database ==========================
                                              'id'  1538840
                                            'path'  /data/Music/Other/PrevSet/[5jazz, blues]/Eddie Condon - Jazz Me Blues.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  222
                                           'genre'  Other;jazz
                                        'filesize'  5353678
                                           'mtime'  1662800401
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [5jazz, blues] Other;jazz
                                      'tag_artist'  Eddie Condon
                                     'tag_release'  Dixieland
                                       'tag_title'  Jazz Me Blues
                                             'bpm'  102.4
                                    'search_title'  'blues':3 'jazz':1 'me':2
                                   'search_artist'  'condon':2 'eddie':1
                                  'search_release'  'dixieland':1
                                     'search_rest'  '5jazz':2,3 'blues':4,5 'jazz':7,9 'other':6,8 'prev':10 'prevset':1 'set':11
                                    'search_combo'  '5jazz':8,9 'blues':3A,10,11 'condon':5B 'dixieland':6C 'eddie':4B 'jazz':1A,13,15 'me':2A 'other':12,14 'prev':16 'prevset':7 'set':17
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['q-bass-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800401.3736567  (2022-09-10 11:00:01)
                             'size'  5353678