======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '196'
                                          'artist'  'Glen Campbell'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Rhinestone Cowboy'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-UNU-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic country', 'country', 'pop', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  ('electronic-generic or '
 'radio-unsorted;ifs-songwriter-pop;ifs-songwriter-folk;ifs-folk-pop;set-pl-billboard')
                                             'bpm'  '115.722'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1'
'TBPM' (BPM (beats per minute))                     '115.722'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted',
 'ifs-songwriter-pop',
 'ifs-songwriter-folk',
 'ifs-folk-pop',
 'set-pl-billboard']
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         'Rhinestone Cowboy'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Glen Campbell'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic country', 'country', 'pop', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.06 dB'
'TXXX:replaygain_track_peak'                        '0.542464'

========================== row from database ==========================
                                              'id'  1297971
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1975/002 - Glen Campbell - Rhinestone Cowboy.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  196
                                           'genre'  electronic-generic or radio-unsorted;ifs-songwriter-pop;ifs-songwriter-folk;ifs-folk-pop;set-pl-billboard
                                        'filesize'  3942725
                                           'mtime'  1642256372
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1975 002 electronic generic or radio unsorted;ifs songwriter pop;ifs songwriter folk;ifs folk pop;set pl billboard
                                      'tag_artist'  Glen Campbell
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Rhinestone Cowboy
                                             'bpm'  115.722
                                    'search_title'  'cowboy':2 'rhinestone':1
                                   'search_artist'  'campbell':2 'glen':1
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1975':3 'billboard':27 'electronic':4 'folk':17,19,21 'generic':5 'ifs':9,11,14,16,18,20 'or':6 'pl':26 'pop':13,15,22,24 'radio':7 'set':23,25 'songwriter':12 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':11 '1':10C '1975':13 'billboard':5C,37 'campbell':4B 'cowboy':2A 'electronic':14 'folk':27,29,31 'generic':15 'glen':3B 'ifs':19,21,24,26,28,30 'of':9C 'or':16 'pl':36 'pop':7C,23,25,32,34 'radio':17 'rhinestone':1A 'set':33,35 'singles':8C 'songwriter':22 'top':6C 'top100':12 'unsorted':18,20
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']
                                      'lastfmtags'  ['classic country', 'country', 'pop', 'folk', 'singer songwriter']
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1642256372.0571954  (2022-01-15 15:19:32)
                             'size'  3942725