======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '172'
                                          'artist'  'Les Paul & Mary Ford'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I Really Don't Want To Know"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'jazz', '50s', 'pop', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-guitar'
                                             'bpm'  '141.611'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '141.611'
'TCON' (Content type, a.k.a. Genre)                 'prerock-guitar'
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         "I Really Don't Want To Know"
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Les Paul & Mary Ford'
'TRCK' (Track number/Position in set)               '17'
'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'                                   ['guitar', 'jazz', '50s', 'pop', 'oldies']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.78 dB'
'TXXX:replaygain_track_peak'                        '0.605867'

========================== row from database ==========================
                                              'id'  1503765
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/Les Paul & Mary Ford - I Really Don_t Want To Know 3-4-1954.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  172
                                           'genre'  prerock-guitar
                                        'filesize'  6911826
                                           'mtime'  1621705378
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 Don_t 3 4 1954 prerock guitar
                                      'tag_artist'  Les Paul & Mary Ford
                                     'tag_release'  None
                                       'tag_title'  I Really Don't Want To Know
                                             'bpm'  141.611
                                    'search_title'  'don':3 'dont':5 'i':1 'know':8 'really':2 't':4 'to':7 'want':6
                                   'search_artist'  'ford':4 'les':1 'mary':3 'paul':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1954':6 '3':9 '4':10 'country':4 'don':7 'exotica':2 'guitar':12 'jazz':1 'oldies':3 'prerock':11 't':8
                                    'search_combo'  '00oldiepop':17 '1954':18 '3':21 '4':22 'country':16 'don':3A,19 'dont':5A 'exotica':14 'ford':12B 'guitar':24 'i':1A 'jazz':13 'know':8A 'les':9B 'mary':11B 'oldies':15 'paul':10B 'prerock':23 'really':2A 't':4A,20 'to':7A 'want':6A
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'jazz', '50s', 'pop', 'oldies']
                                        'tag_date'  1954
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705378.0331585  (2021-05-22 19:42:58)
                             'size'  6911826