======================== unified (from filesystem) ========================
                                         'bitrate'  '191.982'
                                        'duration'  '271'
                                          'artist'  'GusGus'
                                     'text_people'  ''
                                         'release'  'Attention'
                                           'title'  'David'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', '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-2']")
                                      'lastfmtags'  "['electronica', 'trip hop', 'downtempo', 'icelandic', 'electronic']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'electronic-trip hop or downtempo or acid jazz'
                                             'bpm'  '124.929'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Attention'
'TBPM' (BPM (beats per minute))                     '124.929'
'TCON' (Content type, a.k.a. Genre)                 'electronic-trip hop or downtempo or acid jazz'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'David'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'GusGus'
'TRCK' (Track number/Position in set)               '2'
'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:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronica', 'trip hop', 'downtempo', 'icelandic', 'electronic']
'TXXX:original release date'                        ['2002', '2002']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.04 dB'
'TXXX:replaygain_track_peak'                        '0.358733'

========================== row from database ==========================
                                              'id'  1342570
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Gus Gus-Attention-02-David.mp3
                                         'working'  None
                                         'bitrate'  191
                                    'duration_sec'  271
                                           'genre'  electronic-trip hop or downtempo or acid jazz
                                        'filesize'  6519249
                                           'mtime'  1636911449
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 02 electronic trip hop or downtempo or acid jazz
                                      'tag_artist'  GusGus
                                     'tag_release'  Attention
                                       'tag_title'  David
                                             'bpm'  124.929
                                    'search_title'  'david':1
                                   'search_artist'  'gus':2 'gusgus':1
                                  'search_release'  'attention':1
                                     'search_rest'  '00poprockelectronic':1 'acid':12 'downtempo':11 'electronic':7 'files':5,6 'hop':9 'jazz':13 'loose':3,4 'or':10 'trip':8 'unsorted':2
                                    'search_combo'  '00poprockelectronic':5 'acid':16 'attention':4C 'david':1A 'downtempo':15 'electronic':11 'files':9,10 'gus':3B 'gusgus':2B 'hop':13 'jazz':17 'loose':7,8 'or':14 'trip':12 'unsorted':6
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', '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-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'trip hop', 'downtempo', 'icelandic', 'electronic']
                                        'tag_date'  2002
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636911448.651962  (2021-11-14 18:37:28)
                             'size'  6519249