======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '266'
                                          'artist'  'Curtis Stigers '
                                     'text_people'  ''
                                         'release'  "100 Hits Of The 90'S"
                                           'title'  'I Wonder Why  '
                                           'quals'  ("['Q-JZFKS-2', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['jazz', 'blues', 'vocal jazz', 'soul', 'jazz vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '90.050'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "100 Hits Of The 90'S"
'TBPM' (BPM (beats per minute))                     '90.050'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'I Wonder Why  '
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Curtis Stigers '
'TRCK' (Track number/Position in set)               '18'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'blues', 'vocal jazz', 'soul', 'jazz vocal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.84 dB'
'TXXX:replaygain_track_peak'                        '0.425450'

========================== row from database ==========================
                                              'id'  1321497
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/18 I Wonder Why.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  266
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  10659083
                                           'mtime'  1620566640
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 90s 18 electronic generic or radio unsorted
                                      'tag_artist'  Curtis Stigers 
                                     'tag_release'  100 Hits Of The 90'S
                                       'tag_title'  I Wonder Why  
                                             'bpm'  90.05
                                    'search_title'  'i':1 'why':3 'wonder':2
                                   'search_artist'  'curtis':1 'stigers':2
                                  'search_release'  '100':1 '90':5 '90s':7 'hits':2 'of':3 's':6 'the':4
                                     'search_rest'  '00poprockelectronic':1 '18':3 '90s':2 'electronic':4 'generic':5 'or':6 'radio':7 'unsorted':8
                                    'search_combo'  '00poprockelectronic':13 '100':6C '18':15 '90':10C '90s':12C,14 'curtis':4B 'electronic':16 'generic':17 'hits':7C 'i':1A 'of':8C 'or':18 'radio':19 's':11C 'stigers':5B 'the':9C 'unsorted':20 'why':3A 'wonder':2A
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  9B
                                           '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-2', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['jazz', 'blues', 'vocal jazz', 'soul', 'jazz vocal']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620566640.3217385  (2021-05-09 15:24:00)
                             'size'  10659083