======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '123'
                                          'artist'  'The Arrogant Worms'
                                     'text_people'  ''
                                         'release'  "C'est Cheese"
                                           'title'  "Sam, The Guy From 'quincy'"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['funny', 'comedy', 'humour', 'folk', 'canadian']"
                                     'discogstags'  "['rock', 'pop', 'folk rock', 'acoustic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'entertaining-comedians'
                                             'bpm'  '123.256'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "C'est Cheese"
'TBPM' (BPM (beats per minute))                     '123.256'
'TCON' (Content type, a.k.a. Genre)                 'entertaining-comedians'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         "Sam, The Guy From 'quincy'"
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Arrogant Worms'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'pop', 'folk rock', 'acoustic']
'TXXX:lastfmtags'                                   ['funny', 'comedy', 'humour', 'folk', 'canadian']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.83 dB'
'TXXX:replaygain_track_peak'                        '0.434232'

========================== row from database ==========================
                                              'id'  1527810
                                            'path'  /data/Music/Bulk/00spent/Arrogant Worms/C_est Cheese/MBZ;#Arrogant Worms;#Cest Cheese;#01;#Sam, The Guy From Quincy.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  123
                                           'genre'  entertaining-comedians
                                        'filesize'  2963055
                                           'mtime'  1620647229
                                   'redo_metaread'  0
                                        'rest_str'   00spent C_est MBZ;#Arrogant Worms;#Cest Cheese;#01;#Sam, Quincy entertaining comedians
                                      'tag_artist'  The Arrogant Worms
                                     'tag_release'  C'est Cheese
                                       'tag_title'  Sam, The Guy From 'quincy'
                                             'bpm'  123.256
                                    'search_title'  'from':5 'guy':4 'quincy':6,7 'sam':1,2 'the':3
                                   'search_artist'  'arrogant':2 'the':1 'worms':3
                                  'search_release'  'c':1 'cest':3 'cheese':4 'est':2
                                     'search_rest'  '00spent':1 '01':13,16 'arrogant':5,7 'c':2 'cest':9,11 'cheese':12,15 'comedians':20 'entertaining':19 'est':3 'mbz':4,6 'quincy':18 'sam':14,17 'worms':8,10
                                    'search_combo'  '00spent':15 '01':27,30 'arrogant':9B,19,21 'c':11C,16 'cest':13C,23,25 'cheese':14C,26,29 'comedians':34 'entertaining':33 'est':12C,17 'from':5A 'guy':4A 'mbz':18,20 'quincy':6A,7A,32 'sam':1A,2A,28,31 'the':3A,8B 'worms':10B,22,24
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['funny', 'comedy', 'humour', 'folk', 'canadian']
                                        'tag_date'  1993
                                     'discogstags'  ['rock', 'pop', 'folk rock', 'acoustic']

============================== file details ==============================
                                           'mtime'  1620647228.8780239  (2021-05-10 13:47:08)
                             'size'  2963055