======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '245'
                                          'artist'  'Head First'
                                     'text_people'  ''
                                         'release'  'Asphalt Darling 02'
                                           'title'  'Head First - Take me higher'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-3']")
                                      'lastfmtags'  "['breakbeat', 'breaks', 'electronic', 'oldskool haardcore', 'big beat']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '11'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '96.807'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Asphalt Darling 02'
'TBPM' (BPM (beats per minute))                     '96.807'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TIT2' (Title/songname/content description)         'Head First - Take me higher'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '245942'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Head First'
'TRCK' (Track number/Position in set)               '11'
'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'                                   ['breakbeat', 'breaks', 'electronic', 'oldskool haardcore', 'big beat']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.43 dB'
'TXXX:replaygain_track_peak'                        '0.587683'

========================== row from database ==========================
                                              'id'  1288311
                                            'path'  /data/Music/Bulk/00poprockelectronic/Head First/To Da Bone/Head First - Take Me Higher - 05.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  245
                                           'genre'  electronic-unsorted
                                        'filesize'  3936128
                                           'mtime'  1620569706
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic To Bone Me Higher 05 electronic unsorted
                                      'tag_artist'  Head First
                                     'tag_release'  Asphalt Darling 02
                                       'tag_title'  Head First - Take me higher
                                             'bpm'  96.807
                                    'search_title'  'first':2 'head':1 'higher':5 'me':4 'take':3
                                   'search_artist'  'first':2 'head':1
                                  'search_release'  'asphalt':1 'darling':2
                                     'search_rest'  '00poprockelectronic':1 'bone':3 'electronic':6 'higher':5 'me':4 'to':2 'unsorted':7
                                    'search_combo'  '00poprockelectronic':10 'asphalt':8C 'bone':12 'darling':9C 'electronic':15 'first':2A,7B 'head':1A,6B 'higher':5A,14 'me':4A,13 'take':3A 'to':11 'unsorted':16
                                    'tag_tracknum'  11
                                      'num_images'  0
                                             'key'  1A
                                           '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-2', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['breakbeat', 'breaks', 'electronic', 'oldskool haardcore', 'big beat']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620569706.337434  (2021-05-09 16:15:06)
                             'size'  3936128