======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '293'
                                          'artist'  'Kraftwerk'
                                     'text_people'  'Florian Schneider/Karl Bartos/Ralf Hütter'
                                         'release'  'die roboter'
                                           'title'  'robotronik (kling klang mix)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['german', 'electronica', 'electro', 'electronic', 'synthpop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'electronic-we-electropop or synthpop'
                                             'bpm'  '121.994'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         'EMI'
'COMM:ID3v1 Comment:XXX'                            'EMI'
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'PRIV:WM/WMCollectionID:Ï\x90ÿñ,{ÈK°?6ì¯.\x83&'     PRIV(owner='WM/WMCollectionID', data=b'\xcf\x90\xff\xf1,{\xc8K\xb0?6\xec\xaf.\x83&')
'PRIV:WM/WMContentID:\x08È\x04{OúCA°ª\x1ax#Åôã'     PRIV(owner='WM/WMContentID', data=b'\x08\xc8\x04{O\xfaCA\xb0\xaa\x1ax#\xc5\xf4\xe3')
'TALB' (Album/Movie/Show title)                     'die roboter'
'TBPM' (BPM (beats per minute))                     '121.994'
'TCOM' (Composer)                                   'Florian Schneider/Karl Bartos/Ralf Hütter'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-electropop or synthpop'
'TDRC' (Recording time)                             '1991'
'TIT2' (Title/songname/content description)         'robotronik (kling klang mix)'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Kraftwerk'
'TPE2' (Band/orchestra/accompaniment)               'Kraftwerk'
'TPUB' (Publisher)                                  'EMI'
'TRCK' (Track number/Position in set)               '3'
'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', 'electronica', 'electro', 'electronic', 'synthpop']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'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'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.15 dB'
'TXXX:replaygain_track_peak'                        '0.647446'

========================== row from database ==========================
                                              'id'  1298378
                                            'path'  /data/Music/Bulk/00poprockelectronic/Kraftwerk/[1991] die roboter/03-robotronik (kling klang mix).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  293
                                           'genre'  electronic-we-electropop or synthpop
                                        'filesize'  7033872
                                           'mtime'  1628353802
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [1991] 03 electronic electropop or synthpop
                                      'tag_artist'  Kraftwerk
                                     'tag_release'  die roboter
                                       'tag_title'  robotronik (kling klang mix)
                                             'bpm'  121.994
                                    'search_title'  'klang':4 'kling':2,3 'mix':5,6 'robotronik':1
                                   'search_artist'  'kraftwerk':1
                                  'search_release'  'die':1 'roboter':2
                                     'search_rest'  '00poprockelectronic':1 '1991':2,3 'electronic':4 'electropop':5 'or':6 'synthpop':7
                                    'search_combo'  '00poprockelectronic':10 '1991':11,12 'die':8C 'electronic':13 'electropop':14 'klang':4A 'kling':2A,3A 'kraftwerk':7B 'mix':5A,6A 'or':15 'roboter':9C 'robotronik':1A 'synthpop':16
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-3', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['german', 'electronica', 'electro', 'electronic', 'synthpop']
                                        'tag_date'  1991
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628353802.3844953  (2021-08-07 18:30:02)
                             'size'  7033872