======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '323'
                                          'artist'  'Rick Springfield'
                                     'text_people'  ''
                                         'release'  'NDR2 - XXL Maxi Hits (CD 3/3)'
                                           'title'  'Celebrate Youth (Dance Mix)'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'classic rock', 'pop rock', 'pop', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '109.883'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'NDR2 - XXL Maxi Hits (CD 3/3)'
'TBPM' (BPM (beats per minute))                     '109.883'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         'Celebrate Youth (Dance Mix)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rick Springfield'
'TPE2' (Band/orchestra/accompaniment)               'Rick Springfield'
'TRCK' (Track number/Position in set)               '02'
'TXXX:ALBUMARTIST'                                  'V.A.'
'TXXX:ALBUMSORT'                                    '3'
'TXXX:COMMANDS'                                     ('sampler,yf,cd,f2tb,caps2,low2,nul2,rom,band,brk1,vbr,#com102#,oye,soa,low,m3u,spl,nfo,sfv,#var01f#Q '
 'n b j x#var01r#,#var03f#VA#var03r#,#var04f#NoGroup-CannaPower#var04r#,')
'TXXX:COMPILATION'                                  '1'
'TXXX:COVERART'                                     'Front'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:TOTALDISCS'                                   '3'
'TXXX:lastfmtags'                                   ['80s', 'classic rock', 'pop rock', 'pop', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.07 dB'
'TXXX:replaygain_track_peak'                        '0.586203'

========================== row from database ==========================
                                              'id'  1348465
                                            'path'  /data/Music/Bulk/00poprockelectronic/1985 complete/099-B Rick Springfield - Celebrate Youth (dance mix version).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  323
                                           'genre'  rock-cppex
                                        'filesize'  13016411
                                           'mtime'  1620736987
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1985 complete 099 B (dance mix version) rock cppex
                                      'tag_artist'  Rick Springfield
                                     'tag_release'  NDR2 - XXL Maxi Hits (CD 3/3)
                                       'tag_title'  Celebrate Youth (Dance Mix)
                                             'bpm'  109.883
                                    'search_title'  'celebrate':1 'dance':3,4 'mix':5,6 'youth':2
                                   'search_artist'  'rick':1 'springfield':2
                                  'search_release'  '3':7,8 '33':9 'cd':5,6 'hits':4 'maxi':3 'ndr2':1 'xxl':2
                                     'search_rest'  '00poprockelectronic':1 '1985':2 'b':4 'complete':3 'cppex':11 'dance':5,6 'mix':7 'rock':10 'version':8,9
                                    'search_combo'  '00poprockelectronic':18 '1985':19 '3':15C,16C '33':17C 'b':21 'cd':13C,14C 'celebrate':1A 'complete':20 'cppex':28 'dance':3A,4A,22,23 'hits':12C 'maxi':11C 'mix':5A,6A,24 'ndr2':9C 'rick':7B 'rock':27 'springfield':8B 'version':25,26 'xxl':10C 'youth':2A
                                    'tag_tracknum'  2
                                      '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-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'classic rock', 'pop rock', 'pop', 'rock']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736986.9018393  (2021-05-11 14:43:06)
                             'size'  13016411