======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '311'
                                          'artist'  'Wilson Phillips'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'Goodbye Carmen'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', '90s', 'female vocalists', 'pop', 'girl groups']"
                                     'discogstags'  "['rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-female'
                                             'bpm'  '105.368'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '105.368'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-female'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Goodbye Carmen'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Wilson Phillips'
'TRCK' (Track number/Position in set)               '16'
'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'                                  ['rock', 'pop rock']
'TXXX:lastfmtags'                                   ['80s', '90s', 'female vocalists', 'pop', 'girl groups']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.41 dB'
'TXXX:replaygain_track_peak'                        '0.613562'

========================== row from database ==========================
                                              'id'  1343880
                                            'path'  /data/Music/Bulk/00poprockelectronic/Wilson Phillips/2003 - Greatest Hits/16 - Goodbye Carmen.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  311
                                           'genre'  electronic-generic or radio-female
                                        'filesize'  12458670
                                           'mtime'  1622801118
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 2003 16 electronic generic or radio female
                                      'tag_artist'  Wilson Phillips
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Goodbye Carmen
                                             'bpm'  105.368
                                    'search_title'  'carmen':2 'goodbye':1
                                   'search_artist'  'phillips':2 'wilson':1
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00poprockelectronic':1 '2003':2 'electronic':3 'female':7 'generic':4 'or':5 'radio':6
                                    'search_combo'  '00poprockelectronic':7 '2003':8 'carmen':2A 'electronic':9 'female':13 'generic':10 'goodbye':1A 'greatest':5C 'hits':6C 'or':11 'phillips':4B 'radio':12 'wilson':3B
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['80s', '90s', 'female vocalists', 'pop', 'girl groups']
                                        'tag_date'  1990
                                     'discogstags'  ['rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1622801118.3715882  (2021-06-04 12:05:18)
                             'size'  12458670