======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '450'
                                          'artist'  'Filter B'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Last Night In London (Original Mix)'
                                           '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-4', 'q-busy-3', 'q-grit-2', "
 "'q-play-3', 'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', "
 "'q-vocals-1']")
                                     'discogstags'  "['progressive house', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-th-techno-minimal or deephouse'
                                             'bpm'  '123.0'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TBPM' (BPM (beats per minute))                     '123.0'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TIT2' (Title/songname/content description)         'Last Night In London (Original Mix)'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Filter B'
'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'                                  ['progressive house', 'electronic']
'TXXX:q-bass'                                       '4'
'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'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.36 dB'
'TXXX:replaygain_track_peak'                        '0.640804'

========================== row from database ==========================
                                              'id'  1360219
                                            'path'  /data/Music/Bulk/00poprockelectronic/deep house/Filter B - Last Night In London (Original Mix).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  450
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  18129907
                                           'mtime'  1621085294
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic deep house electronic th techno minimal or deephouse
                                      'tag_artist'  Filter B
                                     'tag_release'  None
                                       'tag_title'  Last Night In London (Original Mix)
                                             'bpm'  123.0
                                    'search_title'  'in':3 'last':1 'london':4 'mix':7,8 'night':2 'original':5,6
                                   'search_artist'  'b':2 'filter':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'deep':2 'deephouse':9 'electronic':4 'house':3 'minimal':7 'or':8 'techno':6 'th':5
                                    'search_combo'  '00poprockelectronic':11 'b':10B 'deep':12 'deephouse':19 'electronic':14 'filter':9B 'house':13 'in':3A 'last':1A 'london':4A 'minimal':17 'mix':7A,8A 'night':2A 'or':18 'original':5A,6A 'techno':16 'th':15
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', '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-2', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  ['progressive house', 'electronic']

============================== file details ==============================
                                           'mtime'  1621085294.0481176  (2021-05-15 15:28:14)
                             'size'  18129907