======================== unified (from filesystem) ========================
                                         'bitrate'  '108.818'
                                        'duration'  '171'
                                          'artist'  'The Rolling Stones'
                                     'text_people'  ''
                                         'release'  'Out Of Our Heads'
                                           'title'  'Mercy Mercy'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', '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-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['blues', 'rock', '60s', 'british', 'classic rock']"
                                     'discogstags'  "['rock', 'blues rock', 'rock & roll']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1965'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '123.859'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Out Of Our Heads'
'TBPM' (BPM (beats per minute))                     '123.859'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1965'
'TIT2' (Title/songname/content description)         'Mercy Mercy'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Rolling Stones'
'TRCK' (Track number/Position in set)               '1'
'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:discogstags'                                  ['rock', 'blues rock', 'rock & roll']
'TXXX:lastfmtags'                                   ['blues', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.60 dB'
'TXXX:replaygain_track_peak'                        '0.526817'

========================== row from database ==========================
                                              'id'  1413745
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Rolling Stones - 1965 - Out Of Our Heads/01 - Mercy Mercy.mp3
                                         'working'  None
                                         'bitrate'  108
                                    'duration_sec'  171
                                           'genre'  rock-cppex-classic
                                        'filesize'  2330349
                                           'mtime'  1636038941
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 1965 01 rock cppex classic
                                      'tag_artist'  The Rolling Stones
                                     'tag_release'  Out Of Our Heads
                                       'tag_title'  Mercy Mercy
                                             'bpm'  123.859
                                    'search_title'  'mercy':1
                                   'search_artist'  'rolling':2 'stones':3 'the':1
                                  'search_release'  'heads':4 'of':2 'our':3 'out':1
                                     'search_rest'  '1965':2 'classic':5 'classicprogpsy':1 'cppex':4 'rock':3
                                    'search_combo'  '1965':10 'classic':13 'classicprogpsy':9 'cppex':12 'heads':8C 'mercy':1A 'of':6C 'our':7C 'out':5C 'rock':11 'rolling':3B 'stones':4B 'the':2B
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1965
                                     'discogstags'  ['rock', 'blues rock', 'rock & roll']

============================== file details ==============================
                                           'mtime'  1636038941.0264928  (2021-11-04 16:15:41)
                             'size'  2330349