======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '215'
                                          'artist'  'Marcel de Groot'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Slaap je al'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-1', "
 "'Q-PIANO-3', 'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['the netherlands', 'nederlands', 'nederlandstalig', 'all']"
                                     'discogstags'  "['pop', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '116.320'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.320'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TIT2' (Title/songname/content description)         'Slaap je al'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Marcel de Groot'
'TXXX:Mp3gain_minmax'                               '117,184'
'TXXX:Mp3gain_undo'                                 '+001,+001,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['pop', 'rock']
'TXXX:lastfmtags'                                   ['the netherlands', 'nederlands', 'nederlandstalig', 'all']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.77 dB'
'TXXX:replaygain_track_peak'                        '0.632298'

========================== row from database ==========================
                                              'id'  932241
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00dutch/Marcel de Groot-Slaap je al.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  215
                                           'genre'  loc-eur-netherlands
                                        'filesize'  3452668
                                           'mtime'  1621629376
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00dutch loc eur netherlands
                                      'tag_artist'  Marcel de Groot
                                     'tag_release'  None
                                       'tag_title'  Slaap je al
                                             'bpm'  116.32
                                    'search_title'  'al':3 'je':2 'slaap':1
                                   'search_artist'  'de':2 'groot':3 'marcel':1
                                  'search_release'  
                                     'search_rest'  '00dutch':4 '00mid':1 'eur':6 'europe':3 'loc':5 'netherlands':7 'north':2
                                    'search_combo'  '00dutch':10 '00mid':7 'al':3A 'de':5B 'eur':12 'europe':9 'groot':6B 'je':2A 'loc':11 'marcel':4B 'netherlands':13 'north':8 'slaap':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['the netherlands', 'nederlands', 'nederlandstalig', 'all']
                                        'tag_date'  
                                     'discogstags'  ['pop', 'rock']

============================== file details ==============================
                                           'mtime'  1621629375.9111989  (2021-05-21 22:36:15)
                             'size'  3452668