======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '277'
                                          'artist'  'Schwein'
                                     'text_people'  ''
                                         'release'  'Schweinstein'
                                           'title'  'porno'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['industrial', 'electronic', 'japanese', 'j rock', 'industrial rock']"
                                     'discogstags'  "['industrial', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'loc-asia-japan'
                                             'bpm'  '108.181'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Schweinstein'
'TBPM' (BPM (beats per minute))                     '108.181'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-japan'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'porno'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Schwein'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['industrial', 'electronic']
'TXXX:lastfmtags'                                   ['industrial', 'electronic', 'japanese', 'j rock', 'industrial rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.74 dB'
'TXXX:replaygain_track_peak'                        '0.482248'

========================== row from database ==========================
                                              'id'  1398113
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/SCHWEIN - 2001 - SCHWEINSTEIN/05-porno-fwyh.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  277
                                           'genre'  loc-asia-japan
                                        'filesize'  6656855
                                           'mtime'  1622821631
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia SCHWEIN 2001 SCHWEINSTEIN 05 fwyh loc asia japan
                                      'tag_artist'  Schwein
                                     'tag_release'  Schweinstein
                                       'tag_title'  porno
                                             'bpm'  108.181
                                    'search_title'  'porno':1
                                   'search_artist'  'schwein':1
                                  'search_release'  'schweinstein':1
                                     'search_rest'  '00asia':1 '2001':3 'asia':7 'fwyh':5 'japan':8 'loc':6 'schwein':2 'schweinstein':4
                                    'search_combo'  '00asia':4 '2001':6 'asia':10 'fwyh':8 'japan':11 'loc':9 'porno':1A 'schwein':2B,5 'schweinstein':3C,7
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', '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-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['industrial', 'electronic', 'japanese', 'j rock', 'industrial rock']
                                        'tag_date'  2001
                                     'discogstags'  ['industrial', 'electronic']

============================== file details ==============================
                                           'mtime'  1622821630.9871871  (2021-06-04 17:47:10)
                             'size'  6656855