======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '263'
                                          'artist'  'Elton John & Kiki Dee'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1'
                                           'title'  "Don't Go Breaking My Heart"
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-1']")
                                      'lastfmtags'  "['80s', 'duet', 'oldies', 'pop', '70s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '131.669'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1'
'TBPM' (BPM (beats per minute))                     '131.669'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         "Don't Go Breaking My Heart"
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Elton John & Kiki Dee'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'duet', 'oldies', 'pop', '70s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.21 dB'
'TXXX:replaygain_track_peak'                        '0.868318'

========================== row from database ==========================
                                              'id'  1515393
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1976/002 - Elton John & Kiki Dee - Don_t Go Breaking My Heart.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  263
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  5267686
                                           'mtime'  1620567816
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 1976 002 Don_t electronic generic or radio unsorted
                                      'tag_artist'  Elton John & Kiki Dee
                                     'tag_release'  Billboard Top Pop Singles of 1
                                       'tag_title'  Don't Go Breaking My Heart
                                             'bpm'  131.669
                                    'search_title'  'breaking':5 'don':1 'dont':3 'go':4 'heart':7 'my':6 't':2
                                   'search_artist'  'dee':4 'elton':1 'john':2 'kiki':3
                                  'search_release'  '1':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 '1976':3 'don':4 'electronic':6 'generic':7 'or':8 'radio':9 't':5 'top100':2 'unsorted':10
                                    'search_combo'  '00poprockelectronic':18 '1':17C '1976':20 'billboard':12C 'breaking':5A 'dee':11B 'don':1A,21 'dont':3A 'electronic':23 'elton':8B 'generic':24 'go':4A 'heart':7A 'john':9B 'kiki':10B 'my':6A 'of':16C 'or':25 'pop':14C 'radio':26 'singles':15C 't':2A,22 'top':13C 'top100':19 'unsorted':27
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', '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-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'duet', 'oldies', 'pop', '70s']
                                        'tag_date'  1976
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620567816.3087697  (2021-05-09 15:43:36)
                             'size'  5267686