======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '267'
                                          'artist'  'Sandra'
                                     'text_people'  ''
                                         'release'  '18 Greatest Hits'
                                           'title'  '(Life May Be) A Big Insanity'
                                           'quals'  ("['Q-HAP-4', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['80s', 'dance', 'german', 'female vocalists', 'pop']"
                                     'discogstags'  "['electronic', 'synth-pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'electronic-we-disco or italo'
                                             'bpm'  '114.350'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '18 Greatest Hits'
'TBPM' (BPM (beats per minute))                     '114.350'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-disco or italo'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         '(Life May Be) A Big Insanity'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sandra'
'TRCK' (Track number/Position in set)               '15'
'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:discogstags'                                  ['electronic', 'synth-pop']
'TXXX:lastfmtags'                                   ['80s', 'dance', 'german', 'female vocalists', 'pop']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                        '-0.60 dB'
'TXXX:replaygain_track_peak'                        '0.656415'

========================== row from database ==========================
                                              'id'  1287360
                                            'path'  /data/Music/Bulk/00poprockelectronic-waves-disco/00disco-italo/Sandra/Sandra - (Life May Be) A Big Insanity.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  267
                                           'genre'  electronic-we-disco or italo
                                        'filesize'  4281853
                                           'mtime'  1620610805
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic waves disco 00disco italo electronic we disco or italo
                                      'tag_artist'  Sandra
                                     'tag_release'  18 Greatest Hits
                                       'tag_title'  (Life May Be) A Big Insanity
                                             'bpm'  114.35
                                    'search_title'  'a':6 'be':4,5 'big':7 'insanity':8 'life':1,2 'may':3
                                   'search_artist'  'sandra':1
                                  'search_release'  '18':1 'greatest':2 'hits':3
                                     'search_rest'  '00disco':4 '00poprockelectronic':1 'disco':3 'electronic':6 'italo':5 'or':8 'waves':2 'we':7
                                    'search_combo'  '00disco':16 '00poprockelectronic':13 '18':10C 'a':6A 'be':4A,5A 'big':7A 'disco':15 'electronic':18 'greatest':11C 'hits':12C 'insanity':8A 'italo':17 'life':1A,2A 'may':3A 'or':20 'sandra':9B 'waves':14 'we':19
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  3A
                                           '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-3', 'q-other-2', 'Q-HAP-4', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['80s', 'dance', 'german', 'female vocalists', 'pop']
                                        'tag_date'  1992
                                     'discogstags'  ['electronic', 'synth-pop']

============================== file details ==============================
                                           'mtime'  1620610805.4771202  (2021-05-10 03:40:05)
                             'size'  4281853