======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '294'
                                          'artist'  'Merzbow'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Untitled'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['industrial', 'noise', 'japanoise', 'experimental', 'japanese']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '91.888'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '91.888'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Untitled'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Merzbow'
'TRCK' (Track number/Position in set)               '09'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['industrial', 'noise', 'japanoise', 'experimental', 'japanese']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-5.73 dB'
'TXXX:replaygain_track_peak'                        '0.606785'

========================== row from database ==========================
                                              'id'  1308967
                                            'path'  /data/Music/Bulk/00poprockelectronic/Nanoloop 1.0/Merzbow - Untitled.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  294
                                           'genre'  electronic-experimental
                                        'filesize'  5900938
                                           'mtime'  1636917469
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Nanoloop 1.0 electronic experimental
                                      'tag_artist'  Merzbow
                                     'tag_release'  None
                                       'tag_title'  Untitled
                                             'bpm'  91.888
                                    'search_title'  'untitled':1
                                   'search_artist'  'merzbow':1
                                  'search_release'  
                                     'search_rest'  '0':4 '00poprockelectronic':1 '1':3 '10':5 'electronic':6 'experimental':7 'nanoloop':2
                                    'search_combo'  '0':6 '00poprockelectronic':3 '1':5 '10':7 'electronic':8 'experimental':9 'merzbow':2B 'nanoloop':4 'untitled':1A
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['industrial', 'noise', 'japanoise', 'experimental', 'japanese']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636917469.399005  (2021-11-14 20:17:49)
                             'size'  5900938