======================== unified (from filesystem) ========================
                                         'bitrate'  '248.415'
                                        'duration'  '132'
                                          'artist'  'Freezepop'
                                     'text_people'  'Freezepop'
                                         'release'  'Fashion Impression Function'
                                           'title'  'Bonus Track'
                                           'quals'  ("['Q-MIXBEAT-3', 'Q-HAP-4', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-1', 'Q-OLDST-4', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-1', "
 "'q-play-3', 'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', "
 "'q-vocals-3']")
                                      'lastfmtags'  "['electronica', 'trance', 'techno', 'post rock', 'pop']"
                                     'discogstags'  "['electronic', 'synth-pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '10'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  ('electronic-we-electropop or '
 'synthpop;set-pl-sced;electronic-we-electro-electroclash')
                                             'bpm'  '88.015'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00000412 00000357 0000155D'
'COMM:iTunNORM:eng'                                 (' 00000412 00000357 0000155D 00000E32 00010F64 00010F64 00005593 00004EF7 '
 '00015DBE 0001D059')
'TALB' (Album/Movie/Show title)                     'Fashion Impression Function'
'TBPM' (BPM (beats per minute))                     '88.015'
'TCOM' (Composer)                                   'Freezepop'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-we-electropop or synthpop',
 'set-pl-sced',
 'electronic-we-electro-electroclash']
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Bonus Track'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Freezepop'
'TPE2' (Band/orchestra/accompaniment)               'Freezepop'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '10/10'
'TXXX:Q-HAP'                                        '4'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '3'
'TXXX:Q-OLDST'                                      '4'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'synth-pop']
'TXXX:lastfmtags'                                   ['electronica', 'trance', 'techno', 'post rock', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.83 dB'
'TXXX:replaygain_track_peak'                        '0.531483'

========================== row from database ==========================
                                              'id'  1296983
                                            'path'  /data/Music/Bulk/00poprockelectronic/Freezepop/[2001] Fashion Impression Function/10 Bonus Track.mp3
                                         'working'  None
                                         'bitrate'  248
                                    'duration_sec'  132
                                           'genre'  electronic-we-electropop or synthpop;set-pl-sced;electronic-we-electro-electroclash
                                        'filesize'  4173412
                                           'mtime'  1639842971
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [2001] 10 electronic we electropop or synthpop;set pl sced;electronic we electro electroclash
                                      'tag_artist'  Freezepop
                                     'tag_release'  Fashion Impression Function
                                       'tag_title'  Bonus Track
                                             'bpm'  88.015
                                    'search_title'  'bonus':1 'track':2
                                   'search_artist'  'freezepop':1
                                  'search_release'  'fashion':1 'function':3 'impression':2
                                     'search_rest'  '00poprockelectronic':1 '2001':2,3 'electro':17 'electroclash':18 'electronic':4,14,16 'electropop':6 'or':7 'pl':12 'sced':13,15 'set':9,11 'synthpop':8,10 'we':5
                                    'search_combo'  '00poprockelectronic':7 '2001':8,9 'bonus':1A 'electro':23 'electroclash':24 'electronic':10,20,22 'electropop':12 'fashion':4C 'freezepop':3B 'function':6C 'impression':5C 'or':13 'pl':18 'sced':19,21 'set':15,17 'synthpop':14,16 'track':2A 'we':11
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-3', 'q-play-3', 'Q-OLDST-4', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-4', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['electronica', 'trance', 'techno', 'post rock', 'pop']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'synth-pop']

============================== file details ==============================
                                           'mtime'  1639842971.0416493  (2021-12-18 16:56:11)
                             'size'  4173412