======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '332'
                                          'artist'  'The Knife'
                                     'text_people'  ''
                                         'release'  'The Knife'
                                           'title'  'Pass this on (Dahlback and Dah'
                                           '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-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['swedish', 'electronica', 'poptron', 'electronic', 'synthpop']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'electronic-we-electropop or synthpop'
                                             'bpm'  '129.979'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Knife'
'TBPM' (BPM (beats per minute))                     '129.979'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-electropop or synthpop'
'TDRC' (Recording time)                             '2006'
'TIT2' (Title/songname/content description)         'Pass this on (Dahlback and Dah'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Knife'
'TRCK' (Track number/Position in set)               '3'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.80 dB'
'TXXX:replaygain_track_peak'                        '0.587255'

========================== row from database ==========================
                                              'id'  1456206
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Knife/When I Found the Knife (Bonus CD)/03 Pass this on - Dahlback and Dahlback mix.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  332
                                           'genre'  electronic-we-electropop or synthpop
                                        'filesize'  10641870
                                           'mtime'  1628353769
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic When I Found the (Bonus CD) 03 mix electronic we electropop or synthpop
                                      'tag_artist'  The Knife
                                     'tag_release'  The Knife
                                       'tag_title'  Pass this on (Dahlback and Dah
                                             'bpm'  129.979
                                    'search_title'  'and':6 'dah':7 'dahlback':4,5 'on':3 'pass':1 'this':2
                                   'search_artist'  'knife':2 'the':1
                                  'search_release'  'knife':2 'the':1
                                     'search_rest'  '00poprockelectronic':1 'bonus':6,7 'cd':8,9 'electronic':11 'electropop':13 'found':4 'i':3 'mix':10 'or':14 'synthpop':15 'the':5 'we':12 'when':2
                                    'search_combo'  '00poprockelectronic':12 'and':6A 'bonus':17,18 'cd':19,20 'dah':7A 'dahlback':4A,5A 'electronic':22 'electropop':24 'found':15 'i':14 'knife':9B,11C 'mix':21 'on':3A 'or':25 'pass':1A 'synthpop':26 'the':8B,10C,16 'this':2A 'we':23 'when':13
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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'  1628353769.037857  (2021-08-07 18:29:29)
                             'size'  10641870