======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '163'
                                          'artist'  'Richard Cheese'
                                     'text_people'  ''
                                         'release'  'Lounge Against The Machine'
                                           'title'  'Come Out And Play [Offspring, The]'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'jazz'
                                             'bpm'  '124.2'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Lounge Against The Machine'
'TBPM' (BPM (beats per minute))                     '124.2'
'TCON' (Content type, a.k.a. Genre)                 'jazz'
'TIT2' (Title/songname/content description)         'Come Out And Play [Offspring, The]'
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '163239'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Richard Cheese'
'TRCK' (Track number/Position in set)               '3'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'

========================== row from database ==========================
                                              'id'  1538383
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Richard Cheese/Come out and play.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  163
                                           'genre'  jazz
                                        'filesize'  2613326
                                           'mtime'  1662800498
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] out and play jazz
                                      'tag_artist'  Richard Cheese
                                     'tag_release'  Lounge Against The Machine
                                       'tag_title'  Come Out And Play [Offspring, The]
                                             'bpm'  124.2
                                    'search_title'  'and':3 'come':1 'offspring':5,6 'out':2 'play':4 'the':7,8
                                   'search_artist'  'cheese':2 'richard':1
                                  'search_release'  'against':2 'lounge':1 'machine':4 'the':3
                                     'search_rest'  '9amusing':2,3 'and':5 'jazz':7 'out':4 'play':6 'prev':8 'prevset':1 'set':9
                                    'search_combo'  '9amusing':16,17 'against':12C 'and':3A,19 'cheese':10B 'come':1A 'jazz':21 'lounge':11C 'machine':14C 'offspring':5A,6A 'out':2A,18 'play':4A,20 'prev':22 'prevset':15 'richard':9B 'set':23 'the':7A,8A,13C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800497.7305465  (2022-09-10 11:01:37)
                             'size'  2613326