======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '299'
                                          'artist'  'Nine Inch Nails'
                                     'text_people'  ''
                                         'release'  'Pretty Hate Machine'
                                           'title'  'Head Like a Hole'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-2', 'q-busy-4', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['rock', 'industrial', 'electronic', 'alternative', 'industrial rock']"
                                     'discogstags'  "['electronic', 'rock', 'industrial']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'eid-ebm or industrial or darkwave'
                                             'bpm'  '115.195'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Pretty Hate Machine'
'TBPM' (BPM (beats per minute))                     '115.195'
'TCON' (Content type, a.k.a. Genre)                 'eid-ebm or industrial or darkwave'
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         'Head Like a Hole'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nine Inch Nails'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['electronic', 'rock', 'industrial']
'TXXX:lastfmtags'                                   ['rock', 'industrial', 'electronic', 'alternative', 'industrial rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '4'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.40 dB'
'TXXX:replaygain_track_peak'                        '0.675552'

========================== row from database ==========================
                                              'id'  1361708
                                            'path'  /data/Music/Bulk/00poprockelectronic/Nine Inch Nails/Pretty Hate Machine/Nine Inch Nails - Head Like A Hole.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  299
                                           'genre'  eid-ebm or industrial or darkwave
                                        'filesize'  4800384
                                           'mtime'  1620296948
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic A eid ebm or industrial or darkwave
                                      'tag_artist'  Nine Inch Nails
                                     'tag_release'  Pretty Hate Machine
                                       'tag_title'  Head Like a Hole
                                             'bpm'  115.195
                                    'search_title'  'a':3 'head':1 'hole':4 'like':2
                                   'search_artist'  'inch':2 'nails':3 'nine':1
                                  'search_release'  'hate':2 'machine':3 'pretty':1
                                     'search_rest'  '00poprockelectronic':1 'a':2 'darkwave':7 'ebm':4 'eid':3 'industrial':6 'or':5
                                    'search_combo'  '00poprockelectronic':11 'a':3A,12 'darkwave':17 'ebm':14 'eid':13 'hate':9C 'head':1A 'hole':4A 'inch':6B 'industrial':16 'like':2A 'machine':10C 'nails':7B 'nine':5B 'or':15 'pretty':8C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-4', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-2', 'Q-HAP-1', 'q-bass-2', 'q-grit-4']
                                      'lastfmtags'  ['rock', 'industrial', 'electronic', 'alternative', 'industrial rock']
                                        'tag_date'  1989
                                     'discogstags'  ['electronic', 'rock', 'industrial']

============================== file details ==============================
                                           'mtime'  1620296948.3261926  (2021-05-06 12:29:08)
                             'size'  4800384