======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '20'
                                          'artist'  'n/a'
                                     'text_people'  ''
                                         'release'  'no title'
                                           'title'  'Go Chevrolet (1960s)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['drone', 'ambient', 'noise', 'noise rock', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '98'
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'nonmusic-commercials'
                                             'bpm'  '139.178'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'no title'
'TBPM' (BPM (beats per minute))                     '139.178'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-commercials'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Go Chevrolet (1960s)'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'n/a'
'TRCK' (Track number/Position in set)               '7/98'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['drone', 'ambient', 'noise', 'noise rock', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.16 dB'
'TXXX:replaygain_track_peak'                        '0.489043'

========================== row from database ==========================
                                              'id'  958729
                                            'path'  /data/Music/Bulk/0nonmusic/00commercials-tv-radio-movietrailer/commercial_psa/car ads and PSAs/car ads and PSAs - 07. go chevrolet (1960s).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  20
                                           'genre'  nonmusic-commercials
                                        'filesize'  333071
                                           'mtime'  1620525159
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic 00commercials tv radio movietrailer commercial_psa car ads and PSAs car ads and PSAs 07. go chevrolet nonmusic commercials
                                      'tag_artist'  n/a
                                     'tag_release'  no title
                                       'tag_title'  Go Chevrolet (1960s)
                                             'bpm'  139.178
                                    'search_title'  '1960s':3,4 'chevrolet':2 'go':1
                                   'search_artist'  'a':2 'n':1 'na':3
                                  'search_release'  'no':1 'title':2
                                     'search_rest'  '00commercials':2 '07':12,13 '0nonmusic':1 'ads':9 'and':10 'car':8 'chevrolet':15 'commercial':6 'commercials':17 'go':14 'movietrailer':5 'nonmusic':16 'psa':7 'psas':11 'radio':4 'tv':3
                                    'search_combo'  '00commercials':11 '07':21,22 '0nonmusic':10 '1960s':3A,4A 'a':6B 'ads':18 'and':19 'car':17 'chevrolet':2A,24 'commercial':15 'commercials':26 'go':1A,23 'movietrailer':14 'n':5B 'na':7B 'no':8C 'nonmusic':25 'psa':16 'psas':20 'radio':13 'title':9C 'tv':12
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['drone', 'ambient', 'noise', 'noise rock', 'experimental']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620525159.4586842  (2021-05-09 03:52:39)
                             'size'  333071