======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '255'
                                          'artist'  'Joni Mitchell'
                                     'text_people'  ''
                                         'release'  'Second Fret Sets 1966-1968 [CD 1]'
                                           'title'  'Second Fret Sets 1966-1968  1 03 Mr. Blue'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk;ifs-songwriter-eos'
                                             'bpm'  '117.127'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 00000069 000000BC 00000602 00000BE7 000186E5 000186E5 000023E0 00003258 '
 '000186E5 000186E5')
'TALB' (Album/Movie/Show title)                     'Second Fret Sets 1966-1968 [CD 1]'
'TBPM' (BPM (beats per minute))                     '117.127'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-folk', 'ifs-songwriter-eos']
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         'Second Fret Sets 1966-1968  1 03 Mr. Blue'
'TKEY' (Initial key)                                '2B'
'TLEN' (Length)                                     '255555'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Joni Mitchell'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.32 dB'
'TXXX:replaygain_track_peak'                        '0.778231'

========================== row from database ==========================
                                              'id'  197870
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Joni Mitchell/1968 - Second Frets  1966 - 1968/03 mr. blue.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  255
                                           'genre'  ifs-songwriter-folk;ifs-songwriter-eos
                                        'filesize'  5120000
                                           'mtime'  1636400328
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Frets mr. blue ifs songwriter folk;ifs songwriter eos
                                      'tag_artist'  Joni Mitchell
                                     'tag_release'  Second Fret Sets 1966-1968 [CD 1]
                                       'tag_title'  Second Fret Sets 1966-1968  1 03 Mr. Blue
                                             'bpm'  117.127
                                    'search_title'  '1':7 '1966':4 '19661968':6 '1968':5 'blue':10 'fret':2 'mr':8,9 'second':1 'sets':3
                                   'search_artist'  'joni':1 'mitchell':2
                                  'search_release'  '1':9,10 '1966':4 '19661968':6 '1968':5 'cd':7,8 'fret':2 'second':1 'sets':3
                                     'search_rest'  '00singer':1 'blue':7 'eos':3 'folk':9,11 'frets':4 'ifs':8,10,12 'mr':5,6 'songwriter':2
                                    'search_combo'  '00singer':23 '1':7A,21C,22C '1966':4A,16C '19661968':6A,18C '1968':5A,17C 'blue':10A,29 'cd':19C,20C 'eos':25 'folk':31,33 'fret':2A,14C 'frets':26 'ifs':30,32,34 'joni':11B 'mitchell':12B 'mr':8A,9A,27,28 'second':1A,13C 'sets':3A,15C 'songwriter':24
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
                                        'tag_date'  1968
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636400328.4253452  (2021-11-08 20:38:48)
                             'size'  5120000