======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '234'
                                          'artist'  'PhD'
                                     'text_people'  ''
                                         'release'  'Twin Action'
                                           'title'  "I Won't Let You Down"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'drum and bass', 'atmospheric', 'atmospheric drum and bass', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '107.208'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Twin Action'
'TBPM' (BPM (beats per minute))                     '107.208'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         "I Won't Let You Down"
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'PhD'
'TRCK' (Track number/Position in set)               '13'
'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:lastfmtags'                                   ['80s', 'drum and bass', 'atmospheric', 'atmospheric drum and bass', 'pop']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.65 dB'
'TXXX:replaygain_track_peak'                        '0.718578'

========================== row from database ==========================
                                              'id'  1512981
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Best of 70 80 & 90s - 211 Hits (6CDS)/PhD - I Won_t Let You Down.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  234
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  3756928
                                           'mtime'  1621697725
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic The Best of 70 80 & 90s 211 Hits (6CDS) Won_t electronic generic or radio unsorted
                                      'tag_artist'  PhD
                                     'tag_release'  Twin Action
                                       'tag_title'  I Won't Let You Down
                                             'bpm'  107.208
                                    'search_title'  'down':7 'i':1 'let':5 't':3 'won':2 'wont':4 'you':6
                                   'search_artist'  'd':3 'ph':2 'phd':1
                                  'search_release'  'action':2 'twin':1
                                     'search_rest'  '00poprockelectronic':1 '211':8 '6cds':10,11 '70':5 '80':6 '90s':7 'best':3 'electronic':14 'generic':15 'hits':9 'of':4 'or':16 'radio':17 't':13 'the':2 'unsorted':18 'won':12
                                    'search_combo'  '00poprockelectronic':13 '211':20 '6cds':22,23 '70':17 '80':18 '90s':19 'action':12C 'best':15 'd':10B 'down':7A 'electronic':26 'generic':27 'hits':21 'i':1A 'let':5A 'of':16 'or':28 'ph':9B 'phd':8B 'radio':29 't':3A,25 'the':14 'twin':11C 'unsorted':30 'won':2A,24 'wont':4A 'you':6A
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'drum and bass', 'atmospheric', 'atmospheric drum and bass', 'pop']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697725.433583  (2021-05-22 17:35:25)
                             'size'  3756928