======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '256'
                                          'artist'  'Elton John & Kiki Dee'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Don't go breaking my heart"
                                           'quals'  ("['Q-HAP-4', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['80s', 'duet', 'oldies', 'pop', '70s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'electronic-we-disco or italo'
                                             'bpm'  '132.4'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '132.4'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-disco or italo'
'TDRC' (Recording time)                             '1980'
'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'
'TXXX:Q-HAP'                                        '4'
'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'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'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'                        '+0.01 dB'
'TXXX:replaygain_track_peak'                        '0.770410'

========================== row from database ==========================
                                              'id'  1522833
                                            'path'  /data/Music/Bulk/00poprockelectronic/Disco 70_s 80_s/DSA/Elton John & Kiki Dee - Don_t Go Breaking my Heart.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  256
                                           'genre'  electronic-we-disco or italo
                                        'filesize'  4108160
                                           'mtime'  1620569077
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Disco 70_s 80_s DSA Don_t Go Breaking Heart electronic we disco or italo
                                      'tag_artist'  Elton John & Kiki Dee
                                     'tag_release'  None
                                       'tag_title'  Don't go breaking my heart
                                             'bpm'  132.4
                                    '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'  
                                     'search_rest'  '00poprockelectronic':1 '70':3 '80':5 'breaking':11 'disco':2 'don':8 'dsa':7 'electronic':13 'go':10 'heart':12 'italo':16 'or':15 's':4,6 't':9 'we':14
                                    'search_combo'  '00poprockelectronic':12 '70':14 '80':16 'breaking':5A,22 'dee':11B 'disco':13 'don':1A,19 'dont':3A 'dsa':18 'electronic':24 'elton':8B 'go':4A,21 'heart':7A,23 'italo':27 'john':9B 'kiki':10B 'my':6A 'or':26 's':15,17 't':2A,20 'we':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-4', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['80s', 'duet', 'oldies', 'pop', '70s']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620569076.7401927  (2021-05-09 16:04:36)
                             'size'  4108160