======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '315'
                                          'artist'  'Chemical Brothers'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Block Rockin' Beats"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['electronic', 'big beat', 'dance', 'techno', 'electronica']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '145.3'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TIT2' (Title/songname/content description)         "Block Rockin' Beats"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Chemical Brothers'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['electronic', 'big beat', 'dance', 'techno', 'electronica']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.66 dB'
'TXXX:replaygain_track_peak'                        '0.416976'
'UFID:http://www.jhutveckling.se'                   UFID(owner='http://www.jhutveckling.se', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\xe2\x00%\x00B\x00b\x00\x00\x00\x00\x00\x00\x00\x00')

========================== row from database ==========================
                                              'id'  1502848
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/01 - Chemical Brothers - Block Rockin_ Beats.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  315
                                           'genre'  electronic-unsorted
                                        'filesize'  5047030
                                           'mtime'  1621696704
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 01 Rockin_ electronic unsorted
                                      'tag_artist'  Chemical Brothers
                                     'tag_release'  None
                                       'tag_title'  Block Rockin' Beats
                                             'bpm'  145.3
                                    'search_title'  'beats':4 'block':1 'rockin':2,3
                                   'search_artist'  'brothers':2 'chemical':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'electronic':8 'files':5,6 'loose':3,4 'rockin':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 'beats':4A 'block':1A 'brothers':6B 'chemical':5B 'electronic':14 'files':11,12 'loose':9,10 'rockin':2A,3A,13 'unsorted':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'big beat', 'dance', 'techno', 'electronica']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696704.2691076  (2021-05-22 17:18:24)
                             'size'  5047030