======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '250'
                                          'artist'  'Rammstein'
                                     'text_people'  ''
                                         'release'  'Reise, Reise'
                                           'title'  'Reise, Reise'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['industrial metal', 'german', 'industrial', 'metal', 'rock']"
                                     'discogstags'  "['rock', 'industrial', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '11'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'eid-metal-industrial'
                                             'bpm'  '130.3'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{$\x00\x00'                      PRIV(owner='AverageLevel', data=b'{$\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Reise, Reise'
'TBPM' (BPM (beats per minute))                     '130.3'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-industrial'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Reise, Reise'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rammstein'
'TRCK' (Track number/Position in set)               '1/11'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.83.01, Fraunhofer acm, 160 kBit/s, 44,100 Hz, Stereo, HQ = off'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'industrial', 'heavy metal']
'TXXX:lastfmtags'                                   ['industrial metal', 'german', 'industrial', 'metal', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'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'                        '-1.63 dB'
'TXXX:replaygain_track_peak'                        '0.423305'

========================== row from database ==========================
                                              'id'  1314141
                                            'path'  /data/Music/Bulk/00poprockelectronic/Rammstein/Reise, Reise/Rammstein - 01 - Reise, Reise.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  250
                                           'genre'  eid-metal-industrial
                                        'filesize'  5020574
                                           'mtime'  1620311102
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 01 eid metal industrial
                                      'tag_artist'  Rammstein
                                     'tag_release'  Reise, Reise
                                       'tag_title'  Reise, Reise
                                             'bpm'  130.3
                                    'search_title'  'reise':1,2
                                   'search_artist'  'rammstein':1
                                  'search_release'  'reise':1,2
                                     'search_rest'  '00poprockelectronic':1 'eid':2 'industrial':4 'metal':3
                                    'search_combo'  '00poprockelectronic':6 'eid':7 'industrial':9 'metal':8 'rammstein':3B 'reise':1A,2A,4C,5C
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', '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-4', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'german', 'industrial', 'metal', 'rock']
                                        'tag_date'  2004
                                     'discogstags'  ['rock', 'industrial', 'heavy metal']

============================== file details ==============================
                                           'mtime'  1620311101.5174043  (2021-05-06 16:25:01)
                             'size'  5020574