======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '252'
                                          'artist'  'erika'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'relations'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['jrock', 'japanese music', 'jpop', 'japanese', 'j pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-asia-japan'
                                             'bpm'  '134.914'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '134.914'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-japan'
'TIT2' (Title/songname/content description)         'relations'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'erika'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jrock', 'japanese music', 'jpop', 'japanese', 'j pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.15 dB'
'TXXX:replaygain_track_peak'                        '0.490496'

========================== row from database ==========================
                                              'id'  1319381
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/erika - relations.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  252
                                           'genre'  loc-asia-japan
                                        'filesize'  4045561
                                           'mtime'  1637330179
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] loc asia japan
                                      'tag_artist'  erika
                                     'tag_release'  None
                                       'tag_title'  relations
                                             'bpm'  134.914
                                    'search_title'  'relations':1
                                   'search_artist'  'erika':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'asia':8 'files':5,6 'japan':9 'loc':7 'loose':3,4 'unsorted':2
                                    'search_combo'  '00poprockelectronic':3 'asia':10 'erika':2B 'files':7,8 'japan':11 'loc':9 'loose':5,6 'relations':1A 'unsorted':4
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-2', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['jrock', 'japanese music', 'jpop', 'japanese', 'j pop']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637330179.4987085  (2021-11-19 14:56:19)
                             'size'  4045561