======================== unified (from filesystem) ========================
                                         'bitrate'  '209.777'
                                        'duration'  '374'
                                          'artist'  'The Knife'
                                     'text_people'  ''
                                         'release'  'Like a Pen'
                                           'title'  'Like a Pen (album version)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-4', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['swedish', 'electronica', 'poptron', 'electronic', 'synthpop']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'electronic-we-electropop or synthpop'
                                             'bpm'  '125.083'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Like a Pen'
'TBPM' (BPM (beats per minute))                     '125.083'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-electropop or synthpop'
'TDRC' (Recording time)                             '2006'
'TIT2' (Title/songname/content description)         'Like a Pen (album version)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Knife'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['swedish', 'electronica', 'poptron', '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'                                       '4'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.97 dB'
'TXXX:replaygain_track_peak'                        '0.567362'

========================== row from database ==========================
                                              'id'  1456092
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Knife/Like_A_Pen-CDM-2006/The Knife - Like a Pen - 02 - Like a Pen (album version).mp3
                                         'working'  None
                                         'bitrate'  209
                                    'duration_sec'  374
                                           'genre'  electronic-we-electropop or synthpop
                                        'filesize'  9826551
                                           'mtime'  1628353754
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Like_A_Pen CDM 2006 02 electronic we electropop or synthpop
                                      'tag_artist'  The Knife
                                     'tag_release'  Like a Pen
                                       'tag_title'  Like a Pen (album version)
                                             'bpm'  125.083
                                    'search_title'  'a':2 'album':4,5 'like':1 'pen':3 'version':6,7
                                   'search_artist'  'knife':2 'the':1
                                  'search_release'  'a':2 'like':1 'pen':3
                                     'search_rest'  '00poprockelectronic':1 '2006':6 'a':3 'cdm':5 'electronic':7 'electropop':9 'like':2 'or':10 'pen':4 'synthpop':11 'we':8
                                    'search_combo'  '00poprockelectronic':13 '2006':18 'a':2A,11C,15 'album':4A,5A 'cdm':17 'electronic':19 'electropop':21 'knife':9B 'like':1A,10C,14 'or':22 'pen':3A,12C,16 'synthpop':23 'the':8B 'version':6A,7A 'we':20
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-4', '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'  ['swedish', 'electronica', 'poptron', 'electronic', 'synthpop']
                                        'tag_date'  2006
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1628353754.158872  (2021-08-07 18:29:14)
                             'size'  9826551