======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '230'
                                          'artist'  'June Carter Cash & Johnny Cash'
                                     'text_people'  ''
                                         'release'  'Bob Dylan-The 30th Anniversary'
                                           'title'  "It Ain't Me, Babe"
                                           'quals'  ("['Q-OLDST-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'q-syn-2', "
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 "'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['country', 'classic country', 'duets', 'classic rock', 'country duets']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '104.552'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Bob Dylan-The 30th Anniversary'
'TBPM' (BPM (beats per minute))                     '104.552'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         "It Ain't Me, Babe"
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'June Carter Cash & Johnny Cash'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'classic country', 'duets', 'classic rock', 'country duets']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.12 dB'
'TXXX:replaygain_track_peak'                        '0.601883'

========================== row from database ==========================
                                              'id'  1356139
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/June Carter Cash & Johnny Cash__Bob Dylan-The 30th Anniversary Concert Celebration (Disc 1)__cifsf884.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  230
                                           'genre'  rock-unsorted
                                        'filesize'  9203181
                                           'mtime'  1620392328
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Cash__Bob Concert Celebration (Disc 1)__cifsf884 rock unsorted
                                      'tag_artist'  June Carter Cash & Johnny Cash
                                     'tag_release'  Bob Dylan-The 30th Anniversary
                                       'tag_title'  It Ain't Me, Babe
                                             'bpm'  104.552
                                    'search_title'  'ain':2 'aint':4 'babe':7 'it':1 'me':5,6 't':3
                                   'search_artist'  'carter':2 'cash':3 'johnny':4 'june':1
                                  'search_release'  '30th':5 'anniversary':6 'bob':1 'dylan':2 'dylanthe':4 'the':3
                                     'search_rest'  '00poprockelectronic':1 '1':13,15 'bob':8 'cash':7 'celebration':10 'cifsf884':14,16 'concert':9 'disc':11,12 'files':5,6 'loose':3,4 'rock':17 'unsorted':2
                                    'search_combo'  '00poprockelectronic':18 '1':30,32 '30th':16C 'ain':2A 'aint':4A 'anniversary':17C 'babe':7A 'bob':12C,25 'carter':9B 'cash':10B,24 'celebration':27 'cifsf884':31,33 'concert':26 'disc':28,29 'dylan':13C 'dylanthe':15C 'files':22,23 'it':1A 'johnny':11B 'june':8B 'loose':20,21 'me':5A,6A 'rock':34 't':3A 'the':14C 'unsorted':19
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  11B
                                           '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-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['country', 'classic country', 'duets', 'classic rock', 'country duets']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620392328.3081431  (2021-05-07 14:58:48)
                             'size'  9203181