======================== unified (from filesystem) ========================
                                         'bitrate'  '201.683'
                                        'duration'  '234'
                                          'artist'  'Lady GaGa'
                                     'text_people'  ''
                                         'release'  'The Fame Monster'
                                           'title'  'So Happy I Could Die'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'female vocalists', 'electronic', 'pop']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '100.058'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Fame Monster'
'TBPM' (BPM (beats per minute))                     '100.058'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '2009'
'TIT2' (Title/songname/content description)         'So Happy I Could Die'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lady GaGa'
'TRCK' (Track number/Position in set)               '7'
'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'                                   ['dance', 'female vocalists', 'electronic', 'pop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.95 dB'
'TXXX:replaygain_track_peak'                        '0.406916'

========================== row from database ==========================
                                              'id'  1330309
                                            'path'  /data/Music/Bulk/00poprockelectronic/Lady GaGa/07  Lady Gaga -  So Happy I Could Die.mp3
                                         'working'  None
                                         'bitrate'  201
                                    'duration_sec'  234
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  5926197
                                           'mtime'  1621696330
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 07 Gaga electronic generic or radio dance
                                      'tag_artist'  Lady GaGa
                                     'tag_release'  The Fame Monster
                                       'tag_title'  So Happy I Could Die
                                             'bpm'  100.058
                                    'search_title'  'could':4 'die':5 'happy':2 'i':3 'so':1
                                   'search_artist'  'ga':3 'gaga':2 'lady':1
                                  'search_release'  'fame':2 'monster':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 'dance':7 'electronic':3 'gaga':2 'generic':4 'or':5 'radio':6
                                    'search_combo'  '00poprockelectronic':12 'could':4A 'dance':18 'die':5A 'electronic':14 'fame':10C 'ga':8B 'gaga':7B,13 'generic':15 'happy':2A 'i':3A 'lady':6B 'monster':11C 'or':16 'radio':17 'so':1A 'the':9C
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'female vocalists', 'electronic', 'pop']
                                        'tag_date'  2009
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621696329.6673965  (2021-05-22 17:12:09)
                             'size'  5926197