======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '206'
                                          'artist'  'Double Vision'
                                     'text_people'  ''
                                         'release'  'Pump Up The 90s'
                                           'title'  "Knockin'"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-2', 'q-bass-2', 'q-busy-3', "
 "'q-grit-2', 'q-play-2', 'Q-OLDST-3', 'q-chart-3', 'q-drums-4', 'q-other-2', "
 "'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['eurodance', 'dance', '90s', 'electronic', 'acid jazz']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '139.948'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Pump Up The 90s'
'TBPM' (BPM (beats per minute))                     '139.948'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         "Knockin'"
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Double Vision'
'TPE2' (Band/orchestra/accompaniment)               'Double Vision'
'TRCK' (Track number/Position in set)               '5'
'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'                                   ['eurodance', 'dance', '90s', 'electronic', 'acid jazz']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.51 dB'
'TXXX:replaygain_track_peak'                        '0.413852'

========================== row from database ==========================
                                              'id'  1305344
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/105-double_vision-knockin.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  206
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  4946986
                                           'mtime'  1621696030
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 105 double_vision knockin electronic generic or radio unsorted
                                      'tag_artist'  Double Vision
                                     'tag_release'  Pump Up The 90s
                                       'tag_title'  Knockin'
                                             'bpm'  139.948
                                    'search_title'  'knockin':1,2
                                   'search_artist'  'double':1 'vision':2
                                  'search_release'  '90s':4 'pump':1 'the':3 'up':2
                                     'search_rest'  '00poprockelectronic':1 '105':2 'double':3 'electronic':6 'generic':7 'knockin':5 'or':8 'radio':9 'unsorted':10 'vision':4
                                    'search_combo'  '00poprockelectronic':9 '105':10 '90s':8C 'double':3B,11 'electronic':14 'generic':15 'knockin':1A,2A,13 'or':16 'pump':5C 'radio':17 'the':7C 'unsorted':18 'up':6C 'vision':4B,12
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['eurodance', 'dance', '90s', 'electronic', 'acid jazz']
                                        'tag_date'  1995
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621696030.042716  (2021-05-22 17:07:10)
                             'size'  4946986