======================== unified (from filesystem) ========================
                                         'bitrate'  '223.869'
                                        'duration'  '351'
                                          'artist'  'Craig Armstrong'
                                     'text_people'  ''
                                         'release'  'Layer Cake'
                                           'title'  'Ruthless Gravity'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '14'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'electronic-trip hop or downtempo or acid jazz'
                                             'bpm'  '100.058'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Layer Cake'
'TBPM' (BPM (beats per minute))                     '100.058'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-trip hop or downtempo or acid jazz'
'TDRC' (Recording time)                             '2004-12-28'
'TIT2' (Title/songname/content description)         'Ruthless Gravity'
'TKEY' (Initial key)                                '6A'
'TLAN' (Language(s))                                'eng'
'TPE1' (Lead performer(s)/Soloist(s))               'Craig Armstrong'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '10/14'
'TSOP' (Performer sort order)                       'Armstrong, Craig'
'TXXX:ALBUMARTISTSORT'                              'Various Artists'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         'b1c0f091-a21d-442b-8aa6-edf67065c6e6'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'soundtrack'
'TXXX:MusicBrainz Artist Id'                        '8f7bf43e-2a13-431a-a274-19e28965fe07'
'TXXX:MusicIP PUID'                                 'a5831180-7f50-fde7-2416-510aa8a1e977'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:original release date'                        '2004-09-27'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+5.84 dB'
'TXXX:replaygain_track_peak'                        '0.323597'

========================== row from database ==========================
                                              'id'  1491654
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00dutch/10 - Various Artists - Craig Armstrong - Ruthless Gravity.mp3
                                         'working'  None
                                         'bitrate'  223
                                    'duration_sec'  351
                                           'genre'  electronic-trip hop or downtempo or acid jazz
                                        'filesize'  9847109
                                           'mtime'  1636910123
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00dutch 10 Various Artists electronic trip hop or downtempo or acid jazz
                                      'tag_artist'  Craig Armstrong
                                     'tag_release'  Layer Cake
                                       'tag_title'  Ruthless Gravity
                                             'bpm'  100.058
                                    'search_title'  'gravity':2 'ruthless':1
                                   'search_artist'  'armstrong':2 'craig':1
                                  'search_release'  'cake':2 'layer':1
                                     'search_rest'  '00dutch':4 '00mid':1 'acid':12 'artists':6 'downtempo':11 'electronic':7 'europe':3 'hop':9 'jazz':13 'north':2 'or':10 'trip':8 'various':5
                                    'search_combo'  '00dutch':10 '00mid':7 'acid':18 'armstrong':4B 'artists':12 'cake':6C 'craig':3B 'downtempo':17 'electronic':13 'europe':9 'gravity':2A 'hop':15 'jazz':19 'layer':5C 'north':8 'or':16 'ruthless':1A 'trip':14 'various':11
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  6A
                                           '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-2', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636910123.024905  (2021-11-14 18:15:23)
                             'size'  9847109