======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '169'
                                          'artist'  'Elvis Presley'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Love Me Tender'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll;set-pl-billboard'
                                             'bpm'  '143.011'
                                             'key'  '4A'
                                        '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))                     '143.011'
'TCON' (Content type, a.k.a. Genre)                 ['rock-pop-early-rocknroll', 'set-pl-billboard']
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Love Me Tender'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Elvis Presley'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.56 dB'
'TXXX:replaygain_track_peak'                        '0.416187'

========================== row from database ==========================
                                              'id'  1301473
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1956/015 - Elvis Presley - Love Me Tender .mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  169
                                           'genre'  rock-pop-early-rocknroll;set-pl-billboard
                                        'filesize'  6778329
                                           'mtime'  1622659492
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1956 015 rock pop early rocknroll;set pl billboard
                                      'tag_artist'  Elvis Presley
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Love Me Tender
                                             'bpm'  143.011
                                    'search_title'  'love':1 'me':2 'tender':3
                                   'search_artist'  'elvis':1 'presley':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1956':3 'billboard':12 'early':6 'pl':11 'pop':5 'rock':4 'rocknroll':7,9 'set':8,10 'top100':2
                                    'search_combo'  '00poprockelectronic':12 '1':11C '1956':14 'billboard':6C,23 'early':17 'elvis':4B 'love':1A 'me':2A 'of':10C 'pl':22 'pop':8C,16 'presley':5B 'rock':15 'rocknroll':18,20 'set':19,21 'singles':9C 'tender':3A 'top':7C 'top100':13
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659491.5924075  (2021-06-02 20:44:51)
                             'size'  6778329