======================== unified (from filesystem) ========================
                                         'bitrate'  '224.0'
                                        'duration'  '142'
                                          'artist'  'Rechenzentrum'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Vom Boot Zum Haus'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'Q-PIANO-3', 'q-chart-2', 'q-drums-2', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['german', 'idm', 'electronic', 'experimental', 'minimal']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '07'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '146.0'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '146.0'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TIT2' (Title/songname/content description)         'Vom Boot Zum Haus'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rechenzentrum'
'TRCK' (Track number/Position in set)               '07'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['german', 'idm', 'electronic', 'experimental', 'minimal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.61 dB'
'TXXX:replaygain_track_peak'                        '1.001458'

========================== row from database ==========================
                                              'id'  1359358
                                            'path'  /data/Music/Bulk/00poprockelectronic/Rechenzentrum/John Peel Session/Rechenzentrum - 07 - Vom Boot Zum Haus.mp3
                                         'working'  None
                                         'bitrate'  224
                                    'duration_sec'  142
                                           'genre'  electronic-experimental
                                        'filesize'  3984560
                                           'mtime'  1636917512
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic John Peel Session 07 electronic experimental
                                      'tag_artist'  Rechenzentrum
                                     'tag_release'  None
                                       'tag_title'  Vom Boot Zum Haus
                                             'bpm'  146.0
                                    'search_title'  'boot':2 'haus':4 'vom':1 'zum':3
                                   'search_artist'  'rechenzentrum':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'electronic':5 'experimental':6 'john':2 'peel':3 'session':4
                                    'search_combo'  '00poprockelectronic':6 'boot':2A 'electronic':10 'experimental':11 'haus':4A 'john':7 'peel':8 'rechenzentrum':5B 'session':9 'vom':1A 'zum':3A
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-2', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-3', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['german', 'idm', 'electronic', 'experimental', 'minimal']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636917511.6270494  (2021-11-14 20:18:31)
                             'size'  3984560