======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '416'
                                          'artist'  'Scsi-9'
                                     'text_people'  ''
                                         'release'  'Elfenstaub Vol 4 (Deep Electronic Journey Through Time & Space)'
                                           'title'  'Nostalgia'
                                           'quals'  ("['Q-MIXBEAT-3', 'Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'q-play-2', 'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', "
 "'q-vocals-1']")
                                      'lastfmtags'  "['minimal', 'minimal techno', 'electronic', 'techno', 'kompakt']"
                                     'discogstags'  "['electronic', 'tech house']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '2012'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno-minimal or deephouse'
                                             'bpm'  '114.8'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Elfenstaub Vol 4 (Deep Electronic Journey Through Time & Space)'
'TBPM' (BPM (beats per minute))                     '114.8'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TDRC' (Recording time)                             '2012'
'TIT2' (Title/songname/content description)         'Nostalgia'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Scsi-9'
'TRCK' (Track number/Position in set)               '02'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'tech house']
'TXXX:lastfmtags'                                   ['minimal', 'minimal techno', 'electronic', 'techno', 'kompakt']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.17 dB'
'TXXX:replaygain_track_peak'                        '0.723479'

========================== row from database ==========================
                                              'id'  1320092
                                            'path'  /data/Music/Bulk/00poprockelectronic/Lanig/02. nostalgia - scsi-9.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  416
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  16696135
                                           'mtime'  1621085249
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Lanig 02. nostalgia scsi electronic th techno minimal or deephouse
                                      'tag_artist'  Scsi-9
                                     'tag_release'  Elfenstaub Vol 4 (Deep Electronic Journey Through Time & Space)
                                       'tag_title'  Nostalgia
                                             'bpm'  114.8
                                    'search_title'  'nostalgia':1
                                   'search_artist'  '9':2 'scsi':1 'scsi9':3
                                  'search_release'  '4':3 'deep':4,5 'electronic':6 'elfenstaub':1 'journey':7 'space':10,11 'through':8 'time':9 'vol':2
                                     'search_rest'  '00poprockelectronic':1 '02':3,4 'deephouse':12 'electronic':7 'lanig':2 'minimal':10 'nostalgia':5 'or':11 'scsi':6 'techno':9 'th':8
                                    'search_combo'  '00poprockelectronic':16 '02':18,19 '4':7C '9':3B 'deep':8C,9C 'deephouse':27 'electronic':10C,22 'elfenstaub':5C 'journey':11C 'lanig':17 'minimal':25 'nostalgia':1A,20 'or':26 'scsi':2B,21 'scsi9':4B 'space':14C,15C 'techno':24 'th':23 'through':12C 'time':13C 'vol':6C
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', '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-3', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['minimal', 'minimal techno', 'electronic', 'techno', 'kompakt']
                                        'tag_date'  2012
                                     'discogstags'  ['electronic', 'tech house']

============================== file details ==============================
                                           'mtime'  1621085249.3691118  (2021-05-15 15:27:29)
                             'size'  16696135