======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '217'
                                          'artist'  'Maria Muldaur'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  'Midnight At The Oasis'
                                           'quals'  ("['Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['blues', 'female vocalists', 'folk', 'country', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;set-pl-billboard'
                                             'bpm'  '99.177'
                                             'key'  '3A'
                                        '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))                     '99.177'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         'Midnight At The Oasis'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Maria Muldaur'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '13'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'female vocalists', 'folk', 'country', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.31 dB'
'TXXX:replaygain_track_peak'                        '0.619158'

========================== row from database ==========================
                                              'id'  1328053
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1974/013 - Maria Muldaur - Midnight At The Oasis.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  217
                                           'genre'  electronic-generic or radio-unsorted;set-pl-billboard
                                        'filesize'  4351417
                                           'mtime'  1620385069
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1974 013 electronic generic or radio unsorted;set pl billboard
                                      'tag_artist'  Maria Muldaur
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Midnight At The Oasis
                                             'bpm'  99.177
                                    'search_title'  'at':2 'midnight':1 'oasis':4 'the':3
                                   'search_artist'  'maria':1 'muldaur':2
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1974':3 'billboard':13 'electronic':4 'generic':5 'or':6 'pl':12 'radio':7 'set':9,11 'top100':2 'unsorted':8,10
                                    'search_combo'  '00poprockelectronic':13 '1':12C '1974':15 'at':2A 'billboard':7C,25 'electronic':16 'generic':17 'maria':5B 'midnight':1A 'muldaur':6B 'oasis':4A 'of':11C 'or':18 'pl':24 'pop':9C 'radio':19 'set':21,23 'singles':10C 'the':3A 'top':8C 'top100':14 'unsorted':20,22
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-2', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'female vocalists', 'folk', 'country', 'pop']
                                        'tag_date'  1974
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385069.4323573  (2021-05-07 12:57:49)
                             'size'  4351417