======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '178'
                                          'artist'  'Nine Inch Nails'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Purest Feeling'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'Q-SYN-3', 'Q-BUSY-3', 'Q-GRIT-3', 'Q-PLAY-3', 'q-bass-3', "
 "'Q-CHART-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', "
 "'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['industrial', 'industrial rock', 'rock', 'alternative', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'eid-ebm or industrial or darkwave'
                                             'bpm'  '132.0'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TBPM' (BPM (beats per minute))                     '132.0'
'TCON' (Content type, a.k.a. Genre)                 'eid-ebm or industrial or darkwave'
'TDRC' (Recording time)                             '1988'
'TIT2' (Title/songname/content description)         'Purest Feeling'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nine Inch Nails'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '4'
'TXXX:Q-GRIT'                                       '3'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['industrial', 'industrial rock', 'rock', 'alternative', 'electronic']
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.56 dB'
'TXXX:replaygain_track_peak'                        '0.906488'

========================== row from database ==========================
                                              'id'  1489555
                                            'path'  /data/Music/Bulk/00dwimp/Odds and Ends/Nine Inch Nails - Purest Feeling.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  178
                                           'genre'  eid-ebm or industrial or darkwave
                                        'filesize'  2869524
                                           'mtime'  1620296720
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp Odds and Ends eid ebm or industrial or darkwave
                                      'tag_artist'  Nine Inch Nails
                                     'tag_release'  None
                                       'tag_title'  Purest Feeling
                                             'bpm'  132.0
                                    'search_title'  'feeling':2 'purest':1
                                   'search_artist'  'inch':2 'nails':3 'nine':1
                                  'search_release'  
                                     'search_rest'  '00dwimp':1 'and':3 'darkwave':9 'ebm':6 'eid':5 'ends':4 'industrial':8 'odds':2 'or':7
                                    'search_combo'  '00dwimp':6 'and':8 'darkwave':14 'ebm':11 'eid':10 'ends':9 'feeling':2A 'inch':4B 'industrial':13 'nails':5B 'nine':3B 'odds':7 'or':12 'purest':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-3', 'Q-GRIT-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-CHART-4', 'q-drums-4', 'Q-SYN-3', 'q-other-1', 'Q-BUSY-3', 'Q-HAP-1', 'Q-PLAY-3', 'q-bass-3']
                                      'lastfmtags'  ['industrial', 'industrial rock', 'rock', 'alternative', 'electronic']
                                        'tag_date'  1988
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620296720.2907364  (2021-05-06 12:25:20)
                             'size'  2869524