======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '142'
                                          'artist'  'New Seekers'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1972'
                                           'title'  "I'd Like to Teach the World to"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['pop', '70s', 'oldies', 'folk', 'british']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '93'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '135.637'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1972'
'TBPM' (BPM (beats per minute))                     '135.637'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         "I'd Like to Teach the World to"
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'New Seekers'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '93'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['pop', '70s', 'oldies', 'folk', 'british']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.13 dB'
'TXXX:replaygain_track_peak'                        '0.544786'

========================== row from database ==========================
                                              'id'  1505377
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1972/093 - New Seekers - I_d Like to Teach the World to Sing.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  142
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  2846130
                                           'mtime'  1628353544
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 093 I_d electronic generic radio unsorted
                                      'tag_artist'  New Seekers
                                     'tag_release'  Billboard Top Pop Singles of 1972
                                       'tag_title'  I'd Like to Teach the World to
                                             'bpm'  135.637
                                    'search_title'  'd':2 'i':1 'id':3 'like':4 'teach':6 'the':7 'to':5 'world':8
                                   'search_artist'  'new':1 'seekers':2
                                  'search_release'  '1972':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'd':4 'electronic':5 'generic':6 'i':3 'radio':7 'top100':2 'unsorted':8
                                    'search_combo'  '00poprockelectronic':17 '1972':16C 'billboard':11C 'd':2A,20 'electronic':21 'generic':22 'i':1A,19 'id':3A 'like':4A 'new':9B 'of':15C 'pop':13C 'radio':23 'seekers':10B 'singles':14C 'teach':6A 'the':7A 'to':5A 'top':12C 'top100':18 'unsorted':24 'world':8A
                                    'tag_tracknum'  93
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['pop', '70s', 'oldies', 'folk', 'british']
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628353544.0875165  (2021-08-07 18:25:44)
                             'size'  2846130