======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '169'
                                          'artist'  'Felix Kubin'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'Fernwdrme Wien'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'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-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['electronica', 'avant garde', 'electro', 'electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '123.784'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '123.784'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TIT2' (Title/songname/content description)         'Fernwdrme Wien'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Felix Kubin'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['electronica', 'avant garde', 'electro', 'electronic', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.16 dB'
'TXXX:replaygain_track_peak'                        '0.520004'

========================== row from database ==========================
                                              'id'  949410
                                            'path'  /data/Music/Bulk/sns/Felix Kubin - Fernwärme Wien.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  169
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  4062269
                                           'mtime'  1621044076
                                   'redo_metaread'  0
                                        'rest_str'   sns Fernwärme set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Felix Kubin
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  Fernwdrme Wien
                                             'bpm'  123.784
                                    'search_title'  'fernwdrme':1 'wien':2
                                   'search_artist'  'felix':1 'kubin':2
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'fernwarme':2,3 'mor':10 'pl':5 'set':4,7,9 'shirleyspinoza':6,8 'sns':1
                                    'search_combo'  'felix':3B 'fernwarme':8,9 'fernwdrme':1A 'kubin':4B 'mor':16 'pl':11 'set':10,13,15 'shirley':5C 'shirleyspinoza':12,14 'sns':7 'spinoza':6C 'wien':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', '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'  ['electronica', 'avant garde', 'electro', 'electronic', 'experimental']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621044075.9607055  (2021-05-15 04:01:15)
                             'size'  4062269