======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '160'
                                          'artist'  'They Might Be Giants'
                                     'text_people'  ''
                                         'release'  'No!'
                                           'title'  'Sleepwalkers'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['quirky', 'alternative', 'rock', 'pop', 'happy']"
                                     'discogstags'  '[\'rock\', \'pop\', "children\'s", \'alternative rock\', \'pop rock\']'
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-nerd'
                                             'bpm'  '116.1'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'POPM:'                                             POPM(email='', rating=153, count=0)
'TALB' (Album/Movie/Show title)                     'No!'
'TBPM' (BPM (beats per minute))                     '116.1'
'TCON' (Content type, a.k.a. Genre)                 'rock-nerd'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Sleepwalkers'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'They Might Be Giants'
'TPE2' (Band/orchestra/accompaniment)               'They Might Be Giants'
'TRCK' (Track number/Position in set)               '17'
'TXXX:FMPS_Rating'                                  '0.6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop', "children's", 'alternative rock', 'pop rock']
'TXXX:lastfmtags'                                   ['quirky', 'alternative', 'rock', 'pop', 'happy']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.86 dB'
'TXXX:replaygain_track_peak'                        '0.496527'

========================== row from database ==========================
                                              'id'  1465812
                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/They Might Be Giants/MBZ;#They Might Be Giants;#No!;#17;#Sleepwalkers.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  160
                                           'genre'  rock-nerd
                                        'filesize'  2602582
                                           'mtime'  1621786455
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic poprock indierock MBZ;#They Giants;#No!;#17;#Sleepwalkers rock nerd
                                      'tag_artist'  They Might Be Giants
                                     'tag_release'  No!
                                       'tag_title'  Sleepwalkers
                                             'bpm'  116.1
                                    'search_title'  'sleepwalkers':1
                                   'search_artist'  'be':3 'giants':4 'might':2 'they':1
                                  'search_release'  'no':1
                                     'search_rest'  '00poprockelectronic':1 '17':10,14 'giants':8,12 'indierock':3 'mbz':4,6 'nerd':17 'no':9,13 'poprock':2 'rock':16 'sleepwalkers':11,15 'they':5,7
                                    'search_combo'  '00poprockelectronic':7 '17':16,20 'be':4B 'giants':5B,14,18 'indierock':9 'mbz':10,12 'might':3B 'nerd':23 'no':6C,15,19 'poprock':8 'rock':22 'sleepwalkers':1A,17,21 'they':2B,11,13
                                    'tag_tracknum'  17
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['quirky', 'alternative', 'rock', 'pop', 'happy']
                                        'tag_date'  2002
                                     'discogstags'  ['rock', 'pop', "children's", 'alternative rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1621786455.3606317  (2021-05-23 18:14:15)
                             'size'  2602582