======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '306'
                                          'artist'  'sushi brother'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'shadowfighter (frank b remix)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['r00ts', 'all', 'idm', 'electronic', 'demoscene']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-beats'
                                             'bpm'  '93.803'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '93.803'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-beats'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'shadowfighter (frank b remix)'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'sushi brother'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'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:lastfmtags'                                   ['r00ts', 'all', 'idm', 'electronic', 'demoscene']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.27 dB'
'TXXX:replaygain_track_peak'                        '0.882850'

========================== row from database ==========================
                                              'id'  159503
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/monotonik/monotonik-archives-vol-1/[mtk011]-sushi-brother-shadowfighter-frankbill-remix.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  306
                                           'genre'  electronic-generic or radio-beats
                                        'filesize'  4900419
                                           'mtime'  1620543548
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm monotonik monotonik archives vol 1 [mtk011] frankbill electronic generic or radio beats
                                      'tag_artist'  sushi brother
                                     'tag_release'  None
                                       'tag_title'  shadowfighter (frank b remix)
                                             'bpm'  93.803
                                    'search_title'  'b':4 'frank':2,3 'remix':5,6 'shadowfighter':1
                                   'search_artist'  'brother':2 'sushi':1
                                  'search_release'  
                                     'search_rest'  '1':4 'archives':2 'beats':12 'electronic':8 'frankbill':7 'generic':9 'monotonik':1 'mtk011':5,6 'or':10 'radio':11 'vol':3
                                    'search_combo'  '1':12 'archives':10 'b':4A 'beats':20 'brother':8B 'electronic':16 'frank':2A,3A 'frankbill':15 'generic':17 'monotonik':9 'mtk011':13,14 'or':18 'radio':19 'remix':5A,6A 'shadowfighter':1A 'sushi':7B 'vol':11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-3', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['r00ts', 'all', 'idm', 'electronic', 'demoscene']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620543547.8152761  (2021-05-09 08:59:07)
                             'size'  4900419