======================== unified (from filesystem) ========================
                                         'bitrate'  '138.039'
                                        'duration'  '335'
                                          'artist'  'Zombie Nation'
                                     'text_people'  ''
                                         'release'  'Black Toys'
                                           'title'  'Black Toys'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-4', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-4']")
                                      'lastfmtags'  "['electronica', 'trance', 'techno', 'electronic', 'electro']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '115.064'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Black Toys'
'TBPM' (BPM (beats per minute))                     '115.064'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TDRC' (Recording time)                             '2006'
'TIT2' (Title/songname/content description)         'Black Toys'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Zombie Nation'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronica', 'trance', 'techno', 'electronic', 'electro']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.05 dB'
'TXXX:replaygain_track_peak'                        '0.463480'

========================== row from database ==========================
                                              'id'  1310003
                                            'path'  /data/Music/Bulk/00poprockelectronic/Zombie Nation/02-zombie_nation-black_toys.mp3
                                         'working'  None
                                         'bitrate'  138
                                    'duration_sec'  335
                                           'genre'  electronic-th-techno
                                        'filesize'  5783540
                                           'mtime'  1620573516
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 02 zombie_nation black_toys electronic th techno
                                      'tag_artist'  Zombie Nation
                                     'tag_release'  Black Toys
                                       'tag_title'  Black Toys
                                             'bpm'  115.064
                                    'search_title'  'black':1 'toys':2
                                   'search_artist'  'nation':2 'zombie':1
                                  'search_release'  'black':1 'toys':2
                                     'search_rest'  '00poprockelectronic':1 'black':4 'electronic':6 'nation':3 'techno':8 'th':7 'toys':5 'zombie':2
                                    'search_combo'  '00poprockelectronic':7 'black':1A,5C,10 'electronic':12 'nation':4B,9 'techno':14 'th':13 'toys':2A,6C,11 'zombie':3B,8
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-4', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-4', 'q-chart-3', 'q-other-1', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'trance', 'techno', 'electronic', 'electro']
                                        'tag_date'  2006
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620573515.9420125  (2021-05-09 17:18:35)
                             'size'  5783540