======================== unified (from filesystem) ========================
                                         'bitrate'  '168.631'
                                        'duration'  '252'
                                          'artist'  'Nick Drake'
                                     'text_people'  ''
                                         'release'  'Essential Chill Out'
                                           'title'  'River Man'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '88.865'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Essential Chill Out'
'TBPM' (BPM (beats per minute))                     '88.865'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'River Man'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nick Drake'
'TRCK' (Track number/Position in set)               '09'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.30 dB'
'TXXX:replaygain_track_peak'                        '0.509750'

========================== row from database ==========================
                                              'id'  1420323
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/Essential Chill Out/Nick Drake - 09 - River Man.mp3
                                         'working'  None
                                         'bitrate'  168
                                    'duration_sec'  252
                                           'genre'  ifs-songwriter
                                        'filesize'  5330267
                                           'mtime'  1623435826
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat 09 ifs songwriter
                                      'tag_artist'  Nick Drake
                                     'tag_release'  Essential Chill Out
                                       'tag_title'  River Man
                                             'bpm'  88.865
                                    'search_title'  'man':2 'river':1
                                   'search_artist'  'drake':2 'nick':1
                                  'search_release'  'chill':2 'essential':1 'out':3
                                     'search_rest'  '00poprockelectronic':1 'dance':3 'generic':2 'ifs':5 'songwriter':6 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':8 'chill':6C 'dance':10 'drake':4B 'essential':5C 'generic':9 'ifs':12 'man':2A 'nick':3B 'out':7C 'river':1A 'songwriter':13 'trapbeat':11
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1623435825.988981  (2021-06-11 20:23:45)
                             'size'  5330267