======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '181'
                                          'artist'  'Example'
                                     'text_people'  ''
                                         'release'  "Won't Go Quietly"
                                           'title'  'Kickstarts'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'electronic', 'hip hop', 'british', 'rap']"
                                     'discogstags'  "['electronic', 'house', 'drum n bass']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '126'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         '7A'
'COMM:iTunNORM:eng'                                 (' 00001BD3 00001A25 00007D25 00006519 00007E55 0000DA55 00008000 00008000 '
 '00001355 00000295')
'TALB' (Album/Movie/Show title)                     "Won't Go Quietly"
'TBPM' (BPM (beats per minute))                     '126'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'Kickstarts'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Example'
'TXXX:EnergyLevel'                                  '7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'house', 'drum n bass']
'TXXX:lastfmtags'                                   ['dance', 'electronic', 'hip hop', 'british', 'rap']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-2.27 dB'
'TXXX:replaygain_track_peak'                        '0.383349'

========================== row from database ==========================
                                              'id'  1327697
                                            'path'  /data/Music/Bulk/00poprockelectronic/set/Example -  09 Kickstarts.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  181
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  7599490
                                           'mtime'  1621696883
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic set 09 electronic generic or radio dance
                                      'tag_artist'  Example
                                     'tag_release'  Won't Go Quietly
                                       'tag_title'  Kickstarts
                                             'bpm'  126.0
                                    'search_title'  'kickstarts':1
                                   'search_artist'  'example':1
                                  'search_release'  'go':4 'quietly':5 't':2 'won':1 'wont':3
                                     'search_rest'  '00poprockelectronic':1 'dance':7 'electronic':3 'generic':4 'or':5 'radio':6 'set':2
                                    'search_combo'  '00poprockelectronic':8 'dance':14 'electronic':10 'example':2B 'generic':11 'go':6C 'kickstarts':1A 'or':12 'quietly':7C 'radio':13 'set':9 't':4C 'won':3C 'wont':5C
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'electronic', 'hip hop', 'british', 'rap']
                                        'tag_date'  2010
                                     'discogstags'  ['electronic', 'house', 'drum n bass']

============================== file details ==============================
                                           'mtime'  1621696883.4222376  (2021-05-22 17:21:23)
                             'size'  7599490