======================== unified (from filesystem) ========================
                                         'bitrate'  '131.621'
                                        'duration'  '194'
                                          'artist'  'The Third Wave'
                                     'text_people'  ''
                                         'release'  'Dimitri 60s 70s'
                                           'title'  'Eleanor Rigby'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-OLDST-2', "
 "'Q-HHRNBTT-1', 'Q-SYN-2', 'Q-BUSY-2', 'Q-GRIT-2', 'Q-PLAY-3', 'q-bass-2', "
 "'Q-CHART-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['jazz', 'pop', 'vocal jazz', 'mps', 'covers']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter;set-cover or covered'
                                             'bpm'  '130.2'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Dimitri 60s 70s'
'TBPM' (BPM (beats per minute))                     '130.2'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter', 'set-cover or covered']
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Eleanor Rigby'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Third Wave'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf58.45.100'
'TXXX:Q-BUSY'                                       '2'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'pop', 'vocal jazz', 'mps', 'covers']
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.43 dB'
'TXXX:replaygain_track_peak'                        '0.487482'
'TXXX:youtube'                                      'd_ALqBYblJQ'

========================== row from database ==========================
                                              'id'  1477130
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Dimitri/60s70s/The Third Wave - Eleanor Rigby (Beatles cover)-d_ALqBYblJQ.mp3
                                         'working'  None
                                         'bitrate'  131
                                    'duration_sec'  194
                                           'genre'  ifs-songwriter;set-cover or covered
                                        'filesize'  3201269
                                           'mtime'  1638554929
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 60s70s (Beatles cover) d_ALqBYblJQ ifs songwriter;set cover covered
                                      'tag_artist'  The Third Wave
                                     'tag_release'  Dimitri 60s 70s
                                       'tag_title'  Eleanor Rigby
                                             'bpm'  130.2
                                    'search_title'  'eleanor':1 'rigby':2
                                   'search_artist'  'the':1 'third':2 'wave':3
                                  'search_release'  '60s':2 '70s':3 'dimitri':1
                                     'search_rest'  '60s70s':1 'alq':15 'alqbybljq':7 'beatles':2,3 'bybl':16 'cover':4,5 'covered':13 'd':6,14 'ifs':8 'jq':17 'set':10,12 'songwriter':9,11
                                    'search_combo'  '60s':7C '60s70s':9 '70s':8C 'alq':23 'alqbybljq':15 'beatles':10,11 'bybl':24 'cover':12,13 'covered':21 'd':14,22 'dimitri':6C 'eleanor':1A 'ifs':16 'jq':25 'rigby':2A 'set':18,20 'songwriter':17,19 'the':3B 'third':4B 'wave':5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-2', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-CHART-2', 'q-drums-2', 'Q-SYN-2', 'q-other-3', 'Q-BUSY-2', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-2']
                                      'lastfmtags'  ['jazz', 'pop', 'vocal jazz', 'mps', 'covers']
                                        'tag_date'  1970
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1638554928.5649827  (2021-12-03 19:08:48)
                             'size'  3201269