======================== unified (from filesystem) ========================
                                         'bitrate'  '201.758'
                                        'duration'  '273'
                                          'artist'  'The Who'
                                     'text_people'  ''
                                         'release'  'GrandPassion & Elton John'
                                           'title'  "Saturday Night's Alright (For Fighting) (Elton John)"
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-2', 'q-busy-2', 'q-grit-2', 'q-play-3', 'q-chart-4', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1965'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '102.644'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000004D6 000005B3 00002029 00'
'COMM:iTunNORM:eng'                                 (' 000004D6 000005B3 00002029 00002389 0003CA1E 0003CA1E 0000551E 0000531D '
 '00030821 0003CA07')
'TALB' (Album/Movie/Show title)                     'GrandPassion & Elton John'
'TBPM' (BPM (beats per minute))                     '102.644'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1965'
'TIT2' (Title/songname/content description)         "Saturday Night's Alright (For Fighting) (Elton John)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Who'
'TPE2' (Band/orchestra/accompaniment)               'The Who'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hard rock', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.67 dB'
'TXXX:replaygain_track_peak'                        '0.414236'

========================== row from database ==========================
                                              'id'  1514519
                                            'path'  /data/Music/Bulk/00poprockelectronic/VA - Elton John Covers/The Who - Saturday Night_s Alright (For Fighting) (Elton John).mp3
                                         'working'  None
                                         'bitrate'  201
                                    'duration_sec'  273
                                           'genre'  rock-cppex
                                        'filesize'  6940073
                                           'mtime'  1620737449
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic VA Covers Night_s rock cppex
                                      'tag_artist'  The Who
                                     'tag_release'  GrandPassion & Elton John
                                       'tag_title'  Saturday Night's Alright (For Fighting) (Elton John)
                                             'bpm'  102.644
                                    'search_title'  'alright':5 'elton':10,11 'fighting':8,9 'for':6,7 'john':12,13 'night':2 'nights':4 's':3 'saturday':1
                                   'search_artist'  'the':1 'who':2
                                  'search_release'  'elton':2 'grand':4 'grandpassion':1 'john':3 'passion':5
                                     'search_rest'  '00poprockelectronic':1 'covers':3 'cppex':7 'night':4 'rock':6 's':5 'va':2
                                    'search_combo'  '00poprockelectronic':21 'alright':5A 'covers':23 'cppex':27 'elton':10A,11A,17C 'fighting':8A,9A 'for':6A,7A 'grand':19C 'grandpassion':16C 'john':12A,13A,18C 'night':2A,24 'nights':4A 'passion':20C 'rock':26 's':3A,25 'saturday':1A 'the':14B 'va':22 'who':15B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1965
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737448.6258676  (2021-05-11 14:50:48)
                             'size'  6940073