======================== unified (from filesystem) ========================
                                         'bitrate'  '112.112'
                                        'duration'  '195'
                                          'artist'  'Lucilectric'
                                     'text_people'  ''
                                         'release'  'Deutsche Hits 93 (disc 1)'
                                           'title'  'Mädchen'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['german', '90s', 'female vocalists', 'pop', 'deutsch']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio'
                                             'bpm'  '99.031'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Party'
'TALB' (Album/Movie/Show title)                     'Deutsche Hits 93 (disc 1)'
'TBPM' (BPM (beats per minute))                     '99.031'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Mädchen'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Lucilectric'
'TRCK' (Track number/Position in set)               '12'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['german', '90s', 'female vocalists', 'pop', 'deutsch']
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.47 dB'
'TXXX:replaygain_track_peak'                        '0.636517'

========================== row from database ==========================
                                              'id'  1517150
                                            'path'  /data/Music/Bulk/00poprockelectronic/Lucilectric/MBZ;#Lucilectric;#Bravo Hits Best of _94 (disc 2);#19;#M_dchen.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  195
                                           'genre'  electronic-generic or radio
                                        'filesize'  2740187
                                           'mtime'  1637522777
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic MBZ;#Lucilectric;#Bravo Best of _94 2);#19;#M_dchen electronic generic or radio
                                      'tag_artist'  Lucilectric
                                     'tag_release'  Deutsche Hits 93 (disc 1)
                                       'tag_title'  Mädchen
                                             'bpm'  99.031
                                    'search_title'  'madchen':1,2
                                   'search_artist'  'lucilectric':1
                                  'search_release'  '1':6,7 '93':3 'deutsche':1 'disc':4,5 'hits':2
                                     'search_rest'  '00poprockelectronic':1 '19':12,16 '2':11,15 '94':10 'best':8 'bravo':4,7 'dchen':14,18 'electronic':19 'generic':20 'lucilectric':3,6 'm':13,17 'mbz':2,5 'of':9 'or':21 'radio':22
                                    'search_combo'  '00poprockelectronic':11 '1':9C,10C '19':22,26 '2':21,25 '93':6C '94':20 'best':18 'bravo':14,17 'dchen':24,28 'deutsche':4C 'disc':7C,8C 'electronic':29 'generic':30 'hits':5C 'lucilectric':3B,13,16 'm':23,27 'madchen':1A,2A 'mbz':12,15 'of':19 'or':31 'radio':32
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['german', '90s', 'female vocalists', 'pop', 'deutsch']
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637522777.4628265  (2021-11-21 20:26:17)
                             'size'  2740187