======================== unified (from filesystem) ========================
                                         'bitrate'  '173.649'
                                        'duration'  '122'
                                          'artist'  'Bots'
                                     'text_people'  ''
                                         'release'  'Zeven Dagen Lang'
                                           'title'  'De Bevalling'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-1', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'nederlandstalig', 'rock', 'folk', 'dutch']"
                                     'discogstags'  "['rock', 'folk rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '18'
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '115.3'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Zeven Dagen Lang'
'TBPM' (BPM (beats per minute))                     '115.3'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         'De Bevalling'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bots'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '2/18'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'folk rock']
'TXXX:iTunes_CDDB_IDs'                              '18+5D013D435D62DB9A5F840A593E9391C2+1097776'
'TXXX:lastfmtags'                                   ['folk rock', 'nederlandstalig', 'rock', 'folk', 'dutch']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.98 dB'
'TXXX:replaygain_track_peak'                        '0.765939'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1400854
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/Bots/Zeven Dagen Lang/02 De Bevalling.mp3
                                         'working'  None
                                         'bitrate'  173
                                    'duration_sec'  122
                                           'genre'  loc-eur-netherlands
                                        'filesize'  2653120
                                           'mtime'  1621629495
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 02 loc eur netherlands
                                      'tag_artist'  Bots
                                     'tag_release'  Zeven Dagen Lang
                                       'tag_title'  De Bevalling
                                             'bpm'  115.3
                                    'search_title'  'bevalling':2 'de':1
                                   'search_artist'  'bots':1
                                  'search_release'  'dagen':2 'lang':3 'zeven':1
                                     'search_rest'  '00mid':1 'eur':5 'europe':3 'loc':4 'netherlands':6 'north':2
                                    'search_combo'  '00mid':7 'bevalling':2A 'bots':3B 'dagen':5C 'de':1A 'eur':11 'europe':9 'lang':6C 'loc':10 'netherlands':12 'north':8 'zeven':4C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['folk rock', 'nederlandstalig', 'rock', 'folk', 'dutch']
                                        'tag_date'  1975
                                     'discogstags'  ['rock', 'folk rock']

============================== file details ==============================
                                           'mtime'  1621629495.096449  (2021-05-21 22:38:15)
                             'size'  2653120