======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '314'
                                          'artist'  'REM'
                                     'text_people'  ''
                                         'release'  'top100'
                                           'title'  'Man on the moon'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['rock', 'alternative rock', 'alternative', 'indie', '90s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '118.984'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'top100'
'TBPM' (BPM (beats per minute))                     '118.984'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TIT2' (Title/songname/content description)         'Man on the moon'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'REM'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Mp3gain_minmax'                               '042,188'
'TXXX:Mp3gain_undo'                                 '+005,+005,N'
'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:Tracknum'                                     '078'
'TXXX:lastfmtags'                                   ['rock', 'alternative rock', 'alternative', 'indie', '90s']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.06 dB'
'TXXX:replaygain_track_peak'                        '0.505343'

========================== row from database ==========================
                                              'id'  1406816
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/top100/078-REM-Man_on_the_moon.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  314
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  5029682
                                           'mtime'  1621854168
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat 078 Man_on_the_moon electronic generic or radio dance
                                      'tag_artist'  REM
                                     'tag_release'  top100
                                       'tag_title'  Man on the moon
                                             'bpm'  118.984
                                    'search_title'  'man':1 'moon':4 'on':2 'the':3
                                   'search_artist'  'rem':1
                                  'search_release'  'top100':1
                                     'search_rest'  '00poprockelectronic':1 'dance':3 'electronic':9 'generic':2 'man':5 'moon':8 'on':6 'or':10 'radio':11 'the':7 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':7 'dance':9 'electronic':15 'generic':8 'man':1A,11 'moon':4A,14 'on':2A,12 'or':16 'radio':17 'rem':5B 'the':3A,13 'top100':6C 'trapbeat':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-syn-3', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'alternative rock', 'alternative', 'indie', '90s']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621854167.556492  (2021-05-24 13:02:47)
                             'size'  5029682