======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '291'
                                          'artist'  'Tristania'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Track 9'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['metal', 'gothic', 'female fronted metal', 'symphonic metal', 'gothic metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '119.900'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '119.900'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TDRC' (Recording time)                             '1999'
'TFLT' (File type)                                  '/3'
'TIT2' (Title/songname/content description)         'Track 9'
'TKEY' (Initial key)                                '8A'
'TMED' (Media type)                                 '(CD/DD)'
'TPE1' (Lead performer(s)/Soloist(s))               'Tristania'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['metal', 'gothic', 'female fronted metal', 'symphonic metal', 'gothic metal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.22 dB'
'TXXX:replaygain_track_peak'                        '0.420937'

========================== row from database ==========================
                                              'id'  1394003
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Tristania/Beyond the Veil/Tristania - Heretique - 09.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  291
                                           'genre'  eid-metal
                                        'filesize'  5822464
                                           'mtime'  1620301478
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal Beyond the Veil Heretique 09 eid metal
                                      'tag_artist'  Tristania
                                     'tag_release'  None
                                       'tag_title'  Track 9
                                             'bpm'  119.9
                                    'search_title'  '9':2 'track':1
                                   'search_artist'  'tristania':1
                                  'search_release'  
                                     'search_rest'  '00dwimp':1 '00metal':2 'beyond':3 'eid':7 'heretique':6 'metal':8 'the':4 'veil':5
                                    'search_combo'  '00dwimp':4 '00metal':5 '9':2A 'beyond':6 'eid':10 'heretique':9 'metal':11 'the':7 'track':1A 'tristania':3B 'veil':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-2', 'q-other-3', 'Q-HAP-1', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['metal', 'gothic', 'female fronted metal', 'symphonic metal', 'gothic metal']
                                        'tag_date'  1999
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301478.095059  (2021-05-06 13:44:38)
                             'size'  5822464